[Chapel Merge] Remove `regex.ok` and `regex.error()`

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Branch: refs/heads/main
Revision: 8457fea
Author: e-kayrakli
Link: Unavailable
Log Message:

Merge pull request #19467 from chapel-lang/remove-regex-ok-error

Remove regex.ok and regex.error()

These were deprecated in a previous release. This PR removes them.

[Reviewed by @lydia-duncan]

Test: