feat: move synthtool templates to library_generation/owlbot
#1408
| Job | Run time |
|---|---|
| 9m 31s | |
| 3m 30s | |
| 3m 0s | |
| 9m 11s | |
| 2m 32s | |
| 1m 56s | |
| 1m 39s | |
| 1m 30s | |
| 1m 52s | |
| 2m 36s | |
| 1m 59s | |
| 3m 58s | |
| 3m 30s | |
| 1m 53s | |
| 48m 37s |