Do not sign .js files by default

[ellahathaway]

Example output:

/repos/arcade-validation# ./build.sh -sign
  /root/.nuget/packages/microsoft.dotnet.arcade.sdk/10.0.0-beta.29501.1/tools/Tools.proj                Restore (0.5s)
Restore complete (0.5s)
  Validation net10.0 succeeded (0.1s) → artifacts/bin/Validation/Debug/net10.0/Validation.dll
  Validation.Tests succeeded (0.5s) → artifacts/bin/Validation.Tests/Debug/net10.0/Validation.Tests.dll
  Sign succeeded (0.3s)
    /root/.nuget/packages/microsoft.dotnet.arcade.sdk/10.0.0-beta.29501.1/tools/Sign.proj(76,5): error : Skipping file '/root/repos/arcade-validation/artifacts/packages/Debug/NonShipping/blazor.webview.js' because .js files are no longer signed by default. To disable this warning, please explicitly define the FileExtensionSignInfo for the .js extension or set the MSBuild property 'NoSignJS' to 'true'.

Build failed with 1 error(s) in 2.4s
Build failed with exit code 1. Check errors above.

[mmitche]

Can you open an issue to remove this breaking change and make NoSignJS the default, and link it in a comment here?

Ideally we won't leave this option around long.

[ellahathaway]

Yes - linked the issue in 2da35cb

[ellahathaway]

Looks like the tests had failures. I'll address those now