[Chapel Merge] Make sure _ln is actual codegened as int32

Branch: refs/heads/main
Revision: 310323f510263463a5d252be134921587753b673
Author: jabraham17
Link: Make sure _ln is actual codegened as int32 by jabraham17 · Pull Request #29088 · chapel-lang/chapel · GitHub
Log Message:
Make sure _ln is actual codegened as int32 (#29088)

Follow up to Codegen line information as a 32 bit int by jabraham17 · Pull Request #29084 · chapel-lang/chapel · GitHub

[Not reviewed]

Compare: Comparing fc0a132049ee36ed0c70fedf01703125919b4f68...ecb3ee5b9d1ab3e38e52e706f8ea4238dbc8639c · chapel-lang/chapel · GitHub

Diff:
M compiler/passes/insertLineNumbers.cpp
https://github.com/chapel-lang/chapel/pull/29088.diff