Regressions/coreclr/GitHub_45929/test45929 intermittently fails with gcstress on arm64

[mangod9]

Disabling this test on arm64 for now till we could investigate the crash.

Few issues where this has failed:
#47697
#46803

[BruceForstall]

It's not just arm64. Here's a R2R Windows x64 case:

https://dev.azure.com/dnceng/public/_build/results?buildId=1047040&view=ms.vss-test-web.build-test-results-tab&runId=32390630&resultId=110633&paneView=debug

[BruceForstall]

Plus, #46803 shows cases of Windows arm32 failures

[mangod9]

Ah ok, will disable globally then till we can investigate.

[jakobbotsch]

Failed in Windows ARM32 again in PR #56790: https://dev.azure.com/dnceng/public/_build/results?buildId=1277844&view=ms.vss-test-web.build-test-results-tab