Meta: Update lint-{clang-format,shell-scripts}.sh to take a list of files

This should speed up pre-commit a bit as only files that are staged will
be processed, and clang-format and shellcheck are only invoked once, not
for every file. When no arguments are given (e.g. on CI), it still uses
'git ls-files'.

.pre-commit-config.yaml

@@ -5,4 +5,3 @@ repos:
         name: Running Meta/lint-ci.sh to ensure changes will pass linting on CI
         entry: bash Meta/lint-ci.sh
         language: system
-        pass_filenames: false