ci: Prevent grpcio-tools source builds when generating test matrices
#1577
| Job | Run time |
|---|---|
| 4s | |
| 1m 5s | |
| 1m 9s |
grpcio-tools source builds when generating test matrices
#1577
| Job | Run time |
|---|---|
| 4s | |
| 1m 5s | |
| 1m 9s |