Add pipeline legs for crossgen2 with --large_version_bubble

[jtschuster]

We don't have pipeline legs that build coreclr tests with the framework in the coreclr tests. This would have caught the issue from #125444 in the crossgen2 pipeline. It looks like the change in that PR didn't fully fix the issue but just kicked the can down for a later exception to throw.

Add a job to runtime-coreclr crossgen2-composite to build the tests including the framework libraries.

In composite mode, skip compiling all async methods rather than just not emitting them.

[Copilot]

Pull request overview

Adds CI coverage for crossgen2 composite mode with --inputbubble (“large version bubble”) and updates crossgen2/R2R compilation behavior to avoid async-related token-resolution crashes when running in composite mode.

Changes:

• Add a new crossgen2-composite pipeline leg (linux/windows x64) that runs composite R2R tests with largeVersionBubble: true.
• Plumb largeVersionBubble through Helix templates into helixpublishwitharcade.proj, exporting LargeVersionBubble=1 for test execution.
• Adjust R2R codegen behavior to skip compiling compiler-generated async IL bodies in composite mode; update R2RDump invocation to include --rp.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/tests/Common/helixpublishwitharcade.proj	Adds MSBuild property passthrough + Helix env var export for LargeVersionBubble.
src/tests/Common/CLRTest.CrossGen.targets	Passes --rp to R2RDump and relies on LargeVersionBubble to add --inputbubble to crossgen2 args.
src/coreclr/tools/aot/ILCompiler.ReadyToRun/JitInterface/CorInfoImpl.ReadyToRun.cs	Extends skip logic to avoid compiling compiler-generated async IL bodies in composite mode.
src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRunCodegenNodeFactory.cs	Narrows async-method emission filtering to ARM32 only.
eng/pipelines/coreclr/crossgen2-composite.yml	Adds a new matrix leg for composite + large version bubble runs.
eng/pipelines/common/templates/runtimes/send-to-helix-step.yml	Adds largeVersionBubble parameter and forwards it to Helix publish MSBuild env.
eng/pipelines/common/templates/runtimes/run-test-job.yml	Adds largeVersionBubble parameter and forwards it to send-to-helix; adjusts log prefix.

[jkoritzinsky]

Lets make sure we have an issue filed to re-enable R2Ring runtime-async methods in composite mode as aspnetcore uses composite mode as well in some cases.