[mono] Force AOT+interpreter for iOSSimulator arm64 library test local build

[mdh1418]

When building library tests on iOSSimulator arm64, Thread 6: EXC_BAD_ACCESS (code=1, address=0x0) was being hit at

runtime/src/mono/mono/mini/tramp-arm64.c

Line 571 in 7e175e6

arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);

./build.sh -s mono+libs -os iOSSImulator -arch arm64 -c Debug
./dotnet.sh build /t:Test /p:TargetOS=iOSSimulator /p:TargetArchitecture=arm64 /p:Configuration=Debug src/libraries/System.Buffers/tests

iOSSimulator arm64 doesn't support JIT, so we need to force AOT+interpreter.

This PR does the following to improve local development experience:
Sets RunAOTCompilation to true (if unset) automatically for iOS/tvOS device/sims arm64
Sets MonoForceInterpreter to true (if unset) automatically for iOS/tvOS simulators arm64
Sets MonoAotOption"Interp" if MonoForceInterpreter is set.

Now, contributors can run library tests for iOSlike arm64 platforms without manually specifying RunAOTCompilation=TrueMonoForceInterpreter=True, making the library testing experience more uniform.

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Issue Details

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When building library tests on iOSSimulator arm64, Thread 6: EXC_BAD_ACCESS (code=1, address=0x0) was being hit at

runtime/src/mono/mono/mini/tramp-arm64.c

Line 571 in 7e175e6

arm_subx_imm (code, ARMREG_SP, ARMREG_SP, 256);

.
./build.sh -s mono+libs -os iOSSImulator -arch arm64 -c Debug
./dotnet.sh build /t:Test /p:TargetOS=iOSSimulator /p:TargetArchitecture=arm64 /p:Configuration=Debug src/libraries/System.Buffers/tests

iOSSimulator arm64 doesn't support JIT, so we need to force AOT+interpreter.

This PR sets those two properties by default for library test builds.
It also sets the MonoAotOption"Interp" if MonoForceInterpreter is set.

Author:	mdh1418
Assignees:	-
Labels:	area-Infrastructure-mono
Milestone:	-

[akoeplinger]

LGTM. Do you plan to update the samples and functional tests too?

[mdh1418]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[steveisok]

@mdh1418 can you bring this up to date and if it's all good, merge?

[mdh1418]

/azp run runtime-ioslike,runtime-ioslikesimulator

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[mdh1418]

I believe from offline discussion, the functional tests usage of RunAOTCompilation and MonoForceInterpreter were specific in testing certain scenarios. It might be better to keep them in.

For the samples, I briefly tried to make some of the samples run on arm64 sim for iOS but it seems to need more for them to work.

As such, I think keeping the scope of this PR to affect running library tests on iOS Arm64 device/sim locally is better for now to get it in.

[mdh1418]

The failing test on iOSlike is filed at #78380