Send host tests to helix

[elinor-fung]

Update installer pipelines to send host tests to helix instead of running locally

• Add a post-build step to the installer jobs to send host tests to Helix
• Test runs are named host-<os>-<arch> @ <helix_queue>
• Remove explicit upload of build artifacts on failure.
  • This was for test failure repro/investigation. It is now part of the helix correlation payload, so they can be downloaded that way
• From this PR: Send to Helix step

This change only handles platforms that we were already running tests on (linux_x64, osx_x64, windown_x64, windows_x86). We would want further updates to add other platforms (for example, arm64, linux_musl).

This does remove running of Microsoft.DotNet.CoreSetup.Packaging.Tests tests in PR/CI. I don't think those are particularly useful at this point - I've haven't seen them fail and find an issue in my time here,

Test updates:

• Copy debug CRT to output directory when building IJW test library in debug - we need this to run IJW tests on the test machine
• Resolve /tmp symlink on macOS for test artifacts and assets path for expected path comparisons
• Add retry for restoring test file backup

Contributes to #77800

cc @dotnet/appmodel

[elinor-fung]

/azp run runtime

[azure-pipelines]

Azure Pipelines failed to run 1 pipeline(s).

[am11]

Just curious, if we remove TargetRuntimeIdentifier from here, would it default to OutputRID as before?

[elinor-fung]

Actually, I think the host tests always use OutputRID, so TargetRuntimeIdentifier is not needed/used (and this is just from using the arguments from libraries tests as reference)

[am11]

On this note, I think targetRid (which gets passed to builds as p:TargetRid) shouldn't be needed in eng/pipelines/* in principle as in the code, we compute the OutputRID; except for NonexistentRID (banana.24-x64 dummy RID test leg which is failing for several months) and CentOS9 (centos.9-x64 which is a non-portable RID).

cc @jkoritzinsky

[jkoritzinsky]

The packaging tests should really live in Arcade as part of testing the SharedFramework SDK.

[elinor-fung]

Opened #115522 about moving the packaging tests.