[Chapel Merge] Fix some nightly test failures

Branch: refs/heads/main
Revision: c481bf7162a50352b3efd16c9a9eeb2255eefa8f
Author: dlongnecke-cray
Link: Fix some nightly test failures by dlongnecke-cray · Pull Request #28788 · chapel-lang/chapel · GitHub
Log Message:
Fix some nightly test failures (#28788)

Adjust a new .prediff for a test I added to be aware of --fast and
fix another bug caused by Python's dynamic name resolution. Add a
separate .fast.good file for another test I added.

Compare: Comparing b0be6a523478d1179cdd53152432c97073eddcb0...cb9f185bc201fdbdd492059e1c27d5da4ef38a87 · chapel-lang/chapel · GitHub

Diff:
M test/dynamic-loading/DumpProgramDataEntries.prediff
A test/runtime/stacktrace/MultipleExternNoRename.fast.good
https://github.com/chapel-lang/chapel/pull/28788.diff