[Chapel Merge] Add perf annotation for old ISx regression

Branch: refs/heads/main
Revision: 1709176
Author: ronawho
Link: Add perf annotation for old ISx regression by ronawho · Pull Request #18751 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #18751 from ronawho/isx-perf-annotation

Add perf annotation for old ISx regression

Add an annotation for an older ISx regression that we didn't have time
to look at until now.

Annotates Cray/chapel-private#2534

Modified Files:
M test/ANNOTATIONS.yaml

Compare: https://github.com/chapel-lang/chapel/compare/c3bd459f4b54...170917640def