[TrigP1Test] Fix log checking in the dumpConfig tests
Fix a bug introduced in !51901 (merged).
We no longer run log merging for these tests, because there is only a single log file to be checked. The log merging was removed in !51901 (merged) but the name of the log to be checked was still the merged one which is no longer produced. Force checking the right log file in these tests.
Fixes ATR-25317
Edited by Rafal Bielski