Hard to use `DOTNET_DbgEnableMiniDump` when crossgen is involved somewhere in the build

[ViktorHofer]

runtime/src/coreclr/nativeaot/Runtime/unix/PalCreateDump.cpp

Line 627 in 242f7b2

fprintf(stderr, "DOTNET_DbgEnableMiniDump is set and the createdump binary does not exist: %s\n", program);

This line runs ahead-of-time in the non failure case when setting the DOTNET_DbgEnableMiniDump env var. The Crossgen2 pack currently doesn't ship createdump and therefore this line always raises an error when the env var is set.

This isn't great as it means that you can't set DOTNET_DbgEnableMiniDump if crossgen is involved. I.e. when building the runtime repo.

cc @hoyosjs

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• DOTNET_DbgEnableMiniDump is set and the createdump binary does not exist #108202
• Test failure: JIT/Regression/JitBlue/Runtime_56953/Runtime_56953/Runtime_56953.cmd #113867

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[ericstj]

@steveisok @hoyosjs -- should this be backported?