Dummy TailCallCopyArgsThunk for altjit

[CarolEidt]

Make it easier to track down tail call stress failures.

[CarolEidt]

@dotnet/jit-contrib PTAL
There may be a better way to do this, but adding this made it much easier for me to track down a failure in the GitHub_18362 tailcallstress test. This is the second one of these I've had to track down, and not likely to be the last, since I'm making non-trivial modifications to the ABI handling code.

[BruceForstall]

I don't think we want #ifdef ALT_JIT; I think instead we want to use info.compMatchedVM

[CarolEidt]

Good point! I'll make the change. Do you think that this should be DEBUG-only?

[BruceForstall]

I don't think it needs to be DEBUG only; we use compMatchedVM in non-DEBUG contexts today.

[CarolEidt]

@dotnet-bot test Windows_NT x64 Formatting

[CarolEidt]

@BruceForstall - I've made the change you suggested.

[CarolEidt]

@dotnet-bot test Windows_NT arm64 Cross Checked Innerloop Build and Test

[CarolEidt]

@dotnet-bot test Windows_NT arm64 Cross Checked Innerloop Build and Test

[CarolEidt]

Windows_NT arm64 Cross Checked Innerloop Build and Test

[CarolEidt]

@dotnet-bot test Windows_NT arm64 Cross Checked Innerloop Build and Test