testing: convert *_ignore_patterns to ignore substr

Rename asn_config.json field "lint_ignore_patterns" to "lint_ignore",
and rework to a list of substrings instead of Path patterns,
as pathlib.Path.full_match() isn't available in python < 3.13.
This is similar to the previous asn_ignore_lint.txt behaviour.

Rename asn_config.json field "parse_ignore_patterns" to "parse_ignore",
similar to "lint_ignore" above.

Use slightly more specific substrings in the ignore lists.