[MLIR][NVVM] [NFC] Add summary and description fields for several OPs (#156726)

Several operations in the NVVM dialect were missing summaries and
descriptions. This PR
adds summaries and descriptions for the following operations:

1. nvvm.bar.warp.sync
2. nvvm.barrier
3. nvvm.barrier0
4. nvvm.mbarrier.arrive
5. nvvm.mbarrier.arrive.expect_tx
6. nvvm.mbarrier.arrive.expect_tx.shared
7. nvvm.mbarrier.arrive.nocomplete
8. nvvm.mbarrier.arrive.nocomplete.shared
9. nvvm.mbarrier.arrive.shared
10. nvvm.mbarrier.init
11. nvvm.mbarrier.init.shared
12. nvvm.mbarrier.inval
13. nvvm.mbarrier.inval.shared
14. nvvm.mbarrier.test.wait
15. nvvm.mbarrier.test.wait.shared
16. nvvm.mbarrier.try_wait.parity
17. nvvm.mbarrier.try_wait.parity.shared

Documentation available here:
[mbarrier](https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#parallel-synchronization-and-communication-instructions-mbarrier),
[barrier](https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#parallel-synchronization-and-communication-instructions-mbarrier)

Author: smada3