Convert release-branches.py and update-required-checks.sh to TypeScript
#14414
| Job | Run time |
|---|---|
| 1m 34s | |
| 1m 7s | |
| 5s | |
| 1m 33s | |
| 45s | |
| 1m 9s | |
| 52s | |
| 52s | |
| 7m 57s |