[compiler-rt] [compiler-rt][rtsan] Introduce first end to end RTsan lit tests, enable instrumented unit tests (PR #105732)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

Please fix these warnings, or some bots will fail:

rtsan_test_functional.cpp:159:44: warning: unused variable 'x'
rtsan_test_functional.cpp:163:28: warning: unused variable 'x'

gtest.h:1379:11: warning: comparison of integers of different signs
  from rtsan_test_functional.cpp:148:5:

rtsan_test_interceptors.cpp:325:59: warning: variable 'thread_info' is uninitialized when used here

https://github.com/llvm/llvm-project/pull/105732