chore: Run MMI tests on long-running branches

The `check_mmi_trigger.sh` script has been updated to run MMI-related
tests on long-running branches (`develop`, `master`, and RCs). This is
intended to make it easier for us to detect these regressions sooner,
so that we don't waste time tracking down the commit that caused any
given breakage.

.circleci/scripts/check_mmi_trigger.sh

@@ -9,6 +9,12 @@ if [ -z "$CIRCLE_PULL_REQUEST" ] || [ -z "$GITHUB_TOKEN" ]; then
   exit 0
 fi
 
+if [[ $CIRCLE_BRANCH = 'develop' || $CIRCLE_BRANCH = 'master' || $CIRCLE_BRANCH =~ ^Version-v[0-9.]* ]]; then
+  echo "Long-running branch detected, running MMI tests."
+  echo "run_mmi_tests=true" > mmi_trigger.env
+  exit 0
+fi
+
 # Extract PR number from the pull request URL
 PR_NUMBER=$(echo "$CIRCLE_PULL_REQUEST" | awk -F'/' '{print $NF}')