[ci] Convert version presubmit check to LUCI

.ci/scripts/check_version.sh

@@ -4,14 +4,13 @@
 # found in the LICENSE file.
 set -e
 
-# For pre-submit, this is currently run in Cirrus; see TODO below.
+# For pre-submit, check for missing or breaking changes that don't have a
+# corresponding override label.
 # For post-submit, ignore platform interface breaking version changes and
 # missing version/CHANGELOG detection since PR-level overrides aren't available
 # in post-submit.
 if [[ $LUCI_PR == "" ]]; then
   ./script/tool_runner.sh version-check --ignore-platform-interface-breaks
 else
-  # TODO(stuartmorgan): Migrate this check from Cirrus. See
-  # https://github.com/flutter/flutter/issues/130076
-  :
+  ./script/tool_runner.sh version-check --check-for-missing-changes --pr-labels="$PR_OVERRIDE_LABELS"
 fi

.ci/targets/repo_checks.yaml

@@ -44,13 +44,14 @@ tasks:
     script: script/tool_runner.sh
     args: ["dependabot-check"]
     always: true
-  - name: publishability
-    script: script/tool_runner.sh
-    args: ["publish-check", "--allow-pre-release"]
-    always: true
   - name: CHANGELOG and version validation
     script: .ci/scripts/check_version.sh
     always: true
   - name: federated safety check
     script: .ci/scripts/check_federated_safety.sh
     always: true
+  # This is the slowest test, so prefer keeping it last.
+  - name: publishability
+    script: script/tool_runner.sh
+    args: ["publish-check", "--allow-pre-release"]
+    always: true