Configure r2r to disable runtime code generation in the r2r_interpreter configuration

[BrzVlad]

This configuration used to be hardcoded in crossgen2, but it workaround was recently reverted with proper support added in dotnet/runtime@5b11923. This means r2r_interpreter configuration needs to pass --target-allows-runtime-code-generation:false to crossgen. This can be achieved by having the bdn autogenerated project receive the msbuild property PublishReadyToRunCrossgen2ExtraArgs initialized to this extra arg.

Given bdn doesn't support this configuration via its cli arguments (https://github.com/dotnet/BenchmarkDotNet/blob/master/src/BenchmarkDotNet/ConsoleArguments/CommandLineOptions.cs), we add a new argument to the microbenchmark project --msbuild-arguments, which will be forwarded to bdn via the job arguments (job.WithMsBuildArguments).

[Copilot]

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Pull request overview

This PR updates the performance microbenchmark harness so the coreclr_r2r_interpreter configuration can disable runtime code generation by passing an extra MSBuild property through BenchmarkDotNet to Crossgen2 (PublishReadyToRunCrossgen2ExtraArgs=--target-allows-runtime-code-generation:false).

Changes:

• Add an optional msBuildArguments input to RecommendedConfig.Create and apply it to the BDN Job via WithMsBuildArguments.
• Extend src/benchmarks/micro argument parsing to accept a new --msbuild-arguments flag and forward the values into RecommendedConfig.Create.
• Update scripts/run_performance_job.py to supply the required MSBuild property when runtime_type == coreclr_r2r_interpreter.

File summaries

File	Description
src/harness/BenchmarkDotNet.Extensions/RecommendedConfig.cs	Accepts optional MSBuild arguments and applies them to the BenchmarkDotNet job configuration.
src/benchmarks/micro/Program.cs	Adds parsing/forwarding of a new CLI flag to inject MSBuild arguments into the benchmark job.
scripts/run_performance_job.py	Supplies the R2R interpreter Crossgen2 extra arg via the new MSBuild-arguments pathway.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 2
• Review effort level: Lite

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[BrzVlad]

Tested with ./scripts/benchmarks_ci.py ... "--bdn-arguments=--msbuild-arguments /p:PublishReadyToRunCrossgen2ExtraArgs=--target-allows-runtime-code-generation:false". Not sure if further hardening is relevant.

[BrzVlad]

@DrewScoggins Note that passing this crossgen2 argument to an older version that doesn't support it will simply crash the r2r execution. Not sure how this versioning is handled, whether we are guaranteed that dotnet/performance main is used only with latest main from dotnet/runtime and not with older versions.