New cpp/ql/test/library-tests/regex/Consistency.ql selects, for each
corpus RegExp, characters that failedToParse. The empty
Consistency.expected asserts that no corpus regex has any unparsed
character, mirroring PR #22200's Consistency test as the primary
regression guard for the parser.
Bundle: github/codeql-action codeql-bundle-v2.26.1 (CodeQL CLI 2.26.1).
