[typing] Mark some NamedTuple methods as @final (#15895)
#15522
| Job | Run time |
|---|---|
| 52s | |
| 40s | |
| 42s | |
| 46s | |
| 1m 14s | |
| 38s | |
| 2m 0s | |
| 2m 32s | |
| 39s | |
| 33s | |
| 29s | |
| 1m 56s | |
| 37s | |
| 1m 1s | |
| 1m 26s | |
| 41s | |
| 34s | |
| 17m 20s |