[sanitizer_common][test] Disable CombinedAllocator32Compact etc. on Solaris/sparcv9

As reported in PR 48202, two allocator tests `FAIL` on Solaris/sparcv9,
presumably because Solaris uses the full 64-bit address space and the
allocator cannot deal with that:

  SanitizerCommon-Unit :: ./Sanitizer-sparcv9-Test/SanitizerCommon.CombinedAllocator32Compact
  SanitizerCommon-Unit :: ./Sanitizer-sparcv9-Test/SanitizerCommon.SizeClassAllocator32Iteration

This patch disables the tests.

Tested on `sparcv9-sun-solaris2.11`.

Differential Revision: https://reviews.llvm.org/D91622