Re-enable BrowserLaunchTests tests

[JunTaoLuo]

these tests were disabled as part of #27845. The failure logs indicate it's an assembly mismatch issue:

12/6/2020 2:09:24 PM: post: 'watch : Evaluating dotnet-watch file set.'
12/6/2020 2:09:24 PM: recv: 'watch : Evaluating dotnet-watch file set.'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:24 PM: post: 'watch : Running MSBuild target 'GenerateWatchList' on 'C:\h\w\B075092F\w\B0D809C6\e\tmp\i0axq0dk.hi5\AppWithLaunchSettings\AppWithLaunchSettings.csproj''
12/6/2020 2:09:24 PM: recv: 'watch : Running MSBuild target 'GenerateWatchList' on 'C:\h\w\B075092F\w\B0D809C6\e\tmp\i0axq0dk.hi5\AppWithLaunchSettings\AppWithLaunchSettings.csproj''. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:24 PM: post: 'watch : Started 'C:\h\w\B075092F\w\B0D809C6\e\sdk32326\x64\dotnet.exe' with process id 6024'
12/6/2020 2:09:24 PM: recv: 'watch : Started 'C:\h\w\B075092F\w\B0D809C6\e\sdk32326\x64\dotnet.exe' with process id 6024'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:25 PM: post: 'watch : Process id 6024 ran for 808ms'
12/6/2020 2:09:25 PM: recv: 'watch : Process id 6024 ran for 808ms'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:25 PM: post: 'watch : Watching 2 file(s) for changes'
12/6/2020 2:09:25 PM: recv: 'watch : Watching 2 file(s) for changes'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:25 PM: post: 'watch : Watch command can be configured to use --no-restore.'
12/6/2020 2:09:25 PM: recv: 'watch : Watch command can be configured to use --no-restore.'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:25 PM: post: 'watch : No restore arguments: run --no-restore --'
12/6/2020 2:09:25 PM: recv: 'watch : No restore arguments: run --no-restore --'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:25 PM: post: 'watch : dotnet-watch is configured to launch a browser on ASP.NET Core application startup.'
12/6/2020 2:09:25 PM: recv: 'watch : dotnet-watch is configured to launch a browser on ASP.NET Core application startup.'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: post: 'watch : Refresh server running at ws://127.0.0.1:58794.'
12/6/2020 2:09:26 PM: recv: 'watch : Refresh server running at ws://127.0.0.1:58794.'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: post: 'watch : Started 'C:\h\w\B075092F\w\B0D809C6\e\sdk32326\x64\dotnet.exe' with process id 6936'
12/6/2020 2:09:26 PM: post: 'watch : Running dotnet with the following arguments: run --'
12/6/2020 2:09:26 PM: post: 'watch : Started'
12/6/2020 2:09:26 PM: recv: 'watch : Started 'C:\h\w\B075092F\w\B0D809C6\e\sdk32326\x64\dotnet.exe' with process id 6936'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: 'watch : Running dotnet with the following arguments: run --'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: 'watch : Started'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: post: 'Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.'
12/6/2020 2:09:26 PM: post: 'File name: 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a''
12/6/2020 2:09:26 PM: post: '   at System.Reflection.RuntimeAssembly.GetType(QCallAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type, ObjectHandleOnStack keepAlive, ObjectHandleOnStack assemblyLoadContext)'
12/6/2020 2:09:26 PM: post: '   at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)'
12/6/2020 2:09:26 PM: post: '   at System.Reflection.Assembly.GetType(String name, Boolean throwOnError)'
12/6/2020 2:09:26 PM: post: '   at System.StartupHookProvider.CallStartupHook(StartupHookNameOrPath startupHook)'
12/6/2020 2:09:26 PM: post: '   at System.StartupHookProvider.ProcessStartupHooks()'
12/6/2020 2:09:26 PM: recv: 'Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: 'File name: 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a''. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: '   at System.Reflection.RuntimeAssembly.GetType(QCallAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type, ObjectHandleOnStack keepAlive, ObjectHandleOnStack assemblyLoadContext)'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: '   at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: '   at System.Reflection.Assembly.GetType(String name, Boolean throwOnError)'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: '   at System.StartupHookProvider.CallStartupHook(StartupHookNameOrPath startupHook)'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: recv: '   at System.StartupHookProvider.ProcessStartupHooks()'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: post: 'Writing minidump with heap to file C:\cores\dotnet.6936.dmp'
12/6/2020 2:09:26 PM: recv: 'Writing minidump with heap to file C:\cores\dotnet.6936.dmp'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:26 PM: post: 'Dump successfully written'
12/6/2020 2:09:26 PM: recv: 'Dump successfully written'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:34 PM: post: ''
12/6/2020 2:09:34 PM: recv: ''. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:34 PM: post: 'watch : Process id 6936 ran for 8637ms'
12/6/2020 2:09:34 PM: recv: 'watch : Process id 6936 ran for 8637ms'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:34 PM: post: 'watch : Exited with error code -532462766'
12/6/2020 2:09:34 PM: recv: 'watch : Exited with error code -532462766'. Does not match condition '[msg == 'Started']'.
12/6/2020 2:09:34 PM: post: 'watch : Waiting for a file to change before restarting dotnet...'
12/6/2020 2:09:34 PM: recv: 'watch : Waiting for a file to change before restarting dotnet...'. Does not match condition '[msg == 'Started']'.
Disposing WatchableApp

It shouldn't be difficult to fix this but we'll do it separately to unblock the PR.

[pranavkm]

@JunTaoLuo should I assign it to you to revive these tests once the underlying issue is resolved?

Thanks for contacting us.
We're moving this issue to the Next sprint planning milestone for future evaluation / consideration. We will evaluate the request when we are planning the work for the next milestone. To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[pranavkm]

These were re-enabled as part of the SDK migration: https://github.com/dotnet/sdk/blob/master/src/Tests/dotnet-watch.Tests/BrowserLaunchTests.cs