[llvm] [Offload] Make olLaunchKernel test thread safe (PR #149497)

[Ross Brunton via llvm-commits]

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@@ -104,6 +104,29 @@ TEST_P(olLaunchKernelFooTest, Success) {
   ASSERT_SUCCESS(olMemFree(Mem));
 }
 
+TEST_P(olLaunchKernelFooTest, SuccessThreaded) {
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RossBrunton wrote:

I'd love to be able to add an `OFFLOAD_TEST_THREADED_P` macro so that you'd get threaded and non-threaded tests "for free" without copy-pasting the test body. But I can't think of a good way of actually implementing that with gtest, anyone have any ideas?

https://github.com/llvm/llvm-project/pull/149497