[CI] Derive registered-test kind from the registry call instead of the path (#40294)

.pre-commit-config.yaml

@@ -111,12 +111,6 @@ repos:
         entry: python3 scripts/lint/check_no_bare_pytest_main.py
         language: system
         files: ^(python|test)/.*\.py$
-      - id: check-lint-script-tests
-        name: unit tests for lint checkers
-        entry: python3 -m unittest discover -s scripts/lint -p 'test_check_*.py'
-        language: system
-        files: ^scripts/lint/(check_|test_check_).*\.py$
-        pass_filenames: false
       - id: check-registered-tests
         name: validate registered test CI registries
         entry: python3 scripts/lint/check_registered_tests.py