drm_hwcomposer: CI: Bump clang toolchain version to v14

Additionally:
1. Fix new clang-tidy findings
2. Disable readability-identifier-length check for all tidy levels

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/.ci/.gitlab-ci-checkcommit.sh b/.ci/.gitlab-ci-checkcommit.sh
index c9c2e49..c6f7c4e 100755
--- a/.ci/.gitlab-ci-checkcommit.sh
+++ b/.ci/.gitlab-ci-checkcommit.sh
@@ -50,7 +50,7 @@
 		exit 1
 	fi
 
-	git show "$h" -- | clang-format-diff-13 -p 1 -style=file > /tmp/format-fixup.patch
+	git show "$h" -- | clang-format-diff-14 -p 1 -style=file > /tmp/format-fixup.patch
 	if [ -s  /tmp/format-fixup.patch ]; then
 		cat /tmp/format-fixup.patch >&2
 		exit 1