Set minimum ISAs when compiling native code

[MichalPetryka]

Match native compiler configuration with .NET 11.

For MSVC see x64 and ARM64, for Unixes see GCC.

@am11 Is this the right place for this? I found no usages of /arch or -march anywhere so I just put this here.
cc @jkotas @tannergooding @EgorBo any reason why we wouldn't do this?

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[am11]

I think it'd be better to place them near:

runtime/eng/native/configurecompiler.cmake

Lines 895 to 913 in a7ed27b

	add_compile_options(-march=armv7-a)
	if(ARM_SOFTFP)
	add_definitions(-DARM_SOFTFP)
	add_compile_options(-mfloat-abi=softfp)
	endif(ARM_SOFTFP)
	endif(CLR_CMAKE_HOST_UNIX_ARM)
	if(CLR_CMAKE_HOST_UNIX_ARMV6)
	add_compile_options(-mfpu=vfp)
	add_definitions(-DCLR_ARM_FPU_CAPABILITY=0x0)
	add_compile_options(-march=armv6zk)
	add_compile_options(-mcpu=arm1176jzf-s)
	add_compile_options(-mfloat-abi=hard)
	endif(CLR_CMAKE_HOST_UNIX_ARMV6)
	if(CLR_CMAKE_HOST_UNIX_RISCV64)
	add_compile_options(-march=rv64gc)
	add_compile_options(-mabi=lp64d)
	endif(CLR_CMAKE_HOST_UNIX_RISCV64)

[tannergooding]

I believe we explicitly wanted to wait at least 1 release so that any users got a clear error message and we didn't see big perf wins for the JIT or VM, with the GC already opportunistically using things like LSE

But, I'll defer to Jan

[jkotas]

Related to #118101

[jkotas]

I think it'd be better to place them near:

Yes, I makes sense to have all baselines together.

[jkotas]

This should set LSE_INSTRUCTIONS_ENABLED_BY_DEFAULT define as well