[golang/go] reflect:mayMoreStackMove: TestChanOfGC failures

### ROOT CAUSE The test `TestChanOfGC` is failing with a deadlock, likely due to a race condition or improper synchronization when the garbage collector moves the stack. The removal of the timeout in CL 710618 may have exposed this issue, as the timeout was previously masking the deadlock. ### CODE FIX Modify the test `TestChanOfGC` to use a context with a timeout and ensure proper synchronization. Specifically: 1. Add a context with a timeout to the test. 2. Use the context to limit the execution time of any blocking operations. 3. Review the test for any race conditions and fix them. For example: ```go ctx, cancel := context.WithTimeout(context.Background(), time.Second*10) defer cancel() // Then in the test, use ctx for any blocking operations, e.g., channel sends or receives. ```