[rtsan] Add dl, rt, m, and log libraries as unit test dependencies, get rid of atomic (#98264)

Fixing test failures in #98256 

There are two issues being fixed here:

```
ld.lld: error: undefined symbol: dlvsym
ld.lld: error: undefined symbol: dlvsym
```

Fixed by linking dl

```
FAILED: ... -lstdc++ -no-pie -pthread -latomic -m64
/opt/rh/devtoolset-11/root/usr/lib/gcc/ppc64-redhat-linux/11/../../../../bin/ld: cannot find /usr/lib64/libatomic.so.1
```

Fixed by removing atomic from the dependencies, I don't think we were
even using it.

I added in all of the dependencies used by the parent library in the
tests, hopefully getting ahead of any other issues, adding rt and m,
even if we haven't had issues with them yet

Author: cjappl

compiler-rt/lib/rtsan/tests/CMakeLists.txt

@@ -36,15 +36,17 @@ set(RTSAN_UNITTEST_LINK_FLAGS
   ${SANITIZER_TEST_CXX_LIBRARIES}
   -no-pie)
 
+append_list_if(COMPILER_RT_HAS_LIBDL -ldl RTSAN_UNITTEST_LINK_FLAGS)
+append_list_if(COMPILER_RT_HAS_LIBRT -lrt RTSAN_UNITTEST_LINK_FLAGS)
+append_list_if(COMPILER_RT_HAS_LIBM -lm RTSAN_UNITTEST_LINK_FLAGS)
 append_list_if(COMPILER_RT_HAS_LIBPTHREAD -pthread RTSAN_UNITTEST_LINK_FLAGS)
+append_list_if(COMPILER_RT_HAS_LIBLOG -llog RTSAN_UNITTEST_LINK_FLAGS)
 
 if (APPLE)
   add_weak_symbols("sanitizer_common" WEAK_SYMBOL_LINK_FLAGS)
   list(APPEND RTSAN_UNITTEST_LINK_FLAGS ${WEAK_SYMBOL_LINK_FLAGS})
   list(APPEND RTSAN_UNITTEST_LINK_FLAGS ${DARWIN_osx_LINK_FLAGS})
   list(APPEND RTSAN_UNITTEST_CFLAGS ${DARWIN_osx_CFLAGS})
-else()
-  list(APPEND RTSAN_UNITTEST_LINK_FLAGS -latomic)
 endif()
 
 set(COMPILER_RT_GOOGLETEST_SOURCES ${COMPILER_RT_GTEST_SOURCE} ${COMPILER_RT_GMOCK_SOURCE})