[NativeAOT-LLVM] Problems with libraries tests

[SingleAccretion]

Follow-ups to #2452:

1. Running one test twice for different arches uses stale artifacts.
   -- Publish directory doesn't include arch postfix.
2. XML output is useless (floods the console).
3. XML output is not collected anywhere (probably fine as long as we're not using Helix).
4. Larger tests fail to run when compiled in Debug.
   -- This is a codegen issue.
5. Even larger tests will fail to reserve static memory in the linker.
   • This will be fixed upstream: Automatic INITIAL_MEMORY for statically large modules emscripten-core/emscripten#20888.

[yowl]

CreateSaturatingFromNFloatTests and CreateTruncatingFromIntPtrTest s are #if'ed out. An implementation is needed for LLVM.