runsuite_wrapper.pl is erroneously attributing test failures to i#1938

**Describe the bug**

The test wrapper `runsuite_wrapper.pl` apparently hardwires all expected failures as being due to i#1938.

ref: https://github.com/DynamoRIO/drmemory/blob/release_2.6.0/tests/runsuite_wrapper.pl#L281

**To Reproduce**

Submit a PR and study the ci-clang workflow test output.

**Expected behavior**

Each expected test failure should be attributed to the proper bug.
Otherwise developers have to spend unnecessary time auditing test failures to ensure new bugs aren't missed.

**Screenshots or Pasted Text**

From the ci-clang workflow here: https://github.com/DynamoRIO/drmemory/pull/2532

```
2025-01-13T22:50:33.8979853Z ====> FAILURE in drmemory-dbg-32 <====
2025-01-13T22:50:33.8980200Z drmemory-dbg-32: 113 tests passed, **** 11 tests failed, but ignoring 6 for i1938: ****
2025-01-13T22:50:33.8980541Z selfmod
2025-01-13T22:50:33.8980685Z syscalls_unix
2025-01-13T22:50:33.8980844Z clone
2025-01-13T22:50:33.8980991Z pthread_test
2025-01-13T22:50:33.8981155Z (ignore: i#1938) wrap_cs2bug
2025-01-13T22:50:33.8981366Z (ignore: i#1938) wrap_operators
2025-01-13T22:50:33.8981584Z (ignore: i#1938) pcache-use
2025-01-13T22:50:33.8981772Z realloc
2025-01-13T22:50:33.8981929Z (ignore: i#1938) app_suite
2025-01-13T22:50:33.8982148Z (ignore: i#1938) fuzz_threads
2025-01-13T22:50:33.8982359Z (ignore: i#1938) app_suite.pattern
```

**Versions**

HEAD as of commit https://github.com/DynamoRIO/drmemory/commit/f62daf1e14b63cf7e4dad02d4e8f440c92d48c8e
OS: Test output reports Ubuntu 20.04.6