drm_hwcomposer: CI: Upgrade Ubuntu and clang version

Why:
The aospless file from Android-15 contains compiler flags that
clang-15 does not understand.

Additionally, new tidy findings were suppressed.
It would be nice to fix them in the future instead.

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
diff --git a/.ci/.gitlab-ci-checkcommit.sh b/.ci/.gitlab-ci-checkcommit.sh
index f854999..f821595 100755
--- a/.ci/.gitlab-ci-checkcommit.sh
+++ b/.ci/.gitlab-ci-checkcommit.sh
@@ -36,7 +36,7 @@
 }
 
 check_tool_installed bpfmt
-check_tool_installed clang-format-diff-15
+check_tool_installed clang-format-diff-19
 
 git fetch https://gitlab.freedesktop.org/drm-hwcomposer/drm-hwcomposer.git
 
@@ -61,7 +61,7 @@
 		exit 1
 	fi
 
-	git show "$h" -- | clang-format-diff-15 -p 1 -style=file > /tmp/format-fixup.patch
+	git show "$h" -- | clang-format-diff-19 -p 1 -style=file > /tmp/format-fixup.patch
 	if [ -s  /tmp/format-fixup.patch ]; then
 		cat /tmp/format-fixup.patch >&2
 		exit 1