Link ATEN tests with OpenMP runtime (#59733)
Summary:
Even if OpenMP extensions are supported by compiler, OpenMP runtime library is not always implicitly added as dependency by linker
Above fixes linker problems on Apple M1, when libomp.dylib is installed via conda, when tests that directly use OpenMP pragams fail to link with following errors:
```
/Library/Developer/CommandLineTools/usr/bin/c++ -Wno-deprecated -fvisibility-inlines-hidden -Wno-deprecated-declarations -DUSE_PTHREADPOOL -Xpreprocessor -fopenmp -I/Users/nshulga/miniforge3/include -DNDEBUG -DUSE_KINETO -DLIBKINETO_NOCUPTI -DUSE_PYTORCH_QNNPACK -DUSE_XNNPACK -DSYMBOLICATE_MOBILE_DEBUG_HANDLE -O2 -fPIC -Wno-narrowing -Wall -Wextra -Werror=return-type -Wno-missing-field-initializers -Wno-type-limits -Wno-array-bounds -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-unused-variable -Wno-unused-function -Wno-unused-result -Wno-unused-local-typedefs -Wno-strict-overflow -Wno-strict-aliasing -Wno-error=deprecated-declarations -Wno-error=pedantic -Wno-error=redundant-decls -Wno-error=old-style-cast -Wno-invalid-partial-specialization -Wno-typedef-redefinition -Wno-unknown-warning-option -Wno-unused-private-field -Wno-inconsistent-missing-override -Wno-aligned-allocation-unavailable -Wno-c++14-extensions -Wno-constexpr-not-const -Wno-missing-braces -Qunused-arguments -fcolor-diagnostics -fno-math-errno -fno-trapping-math -Werror=format -Werror=cast-function-type -Wno-unused-private-field -Wno-missing-braces -Wno-c++14-extensions -Wno-constexpr-not-const -O3 -DNDEBUG -DNDEBUG -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names -rdynamic caffe2/CMakeFiles/test_parallel.dir/__/aten/src/ATen/test/test_parallel.cpp.o -o bin/test_parallel -Wl,-rpath,/Users/nshulga/git/pytorch/build/lib lib/libgtest_main.a lib/libtorch.dylib lib/libtorch_cpu.dylib lib/libprotobuf.a lib/libc10.dylib lib/libgtest.a && :
Undefined symbols for architecture arm64:
"___kmpc_fork_call", referenced from:
TestParallel_NestedParallel_Test::TestBody() in test_parallel.cpp.o
TestParallel_Exceptions_Test::TestBody() in test_parallel.cpp.o
"_omp_get_max_threads", referenced from:
TestParallel_NestedParallel_Test::TestBody() in test_parallel.cpp.o
TestParallel_Exceptions_Test::TestBody() in test_parallel.cpp.o
"_omp_get_num_threads", referenced from:
_.omp_outlined. in test_parallel.cpp.o
_.omp_outlined..31 in test_parallel.cpp.o
"_omp_get_thread_num", referenced from:
_.omp_outlined. in test_parallel.cpp.o
_.omp_outlined..31 in test_parallel.cpp.o
"_omp_in_parallel", referenced from:
TestParallel_NestedParallel_Test::TestBody() in test_parallel.cpp.o
TestParallel_Exceptions_Test::TestBody() in test_parallel.cpp.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59733
Reviewed By: walterddr, seemethere
Differential Revision: D29005511
Pulled By: malfet
fbshipit-source-id: daab5e1b0a58d9b60a8992ef40c743e4b619dac7
