testrunner: fold PreprocessorHelper into TestPreprocessor (#7848)
#16902
| Job | Run time |
|---|---|
| 4m 35s | |
| 4m 35s |
PreprocessorHelper into TestPreprocessor (#7848)
#16902
| Job | Run time |
|---|---|
| 4m 35s | |
| 4m 35s |