ci: skip ci failure slack notifications for renovate branches (#24692)

We want to skip CI failure Slack notifications for upstream branches
which are not actual publish branches.

Please enter the commit message for your changes. Lines starting

(cherry picked from commit 9cb96aa)

scripts/circleci/notify-slack-job-failure.js

@@ -5,19 +5,35 @@
  * will be a noop when running for forked builds (i.e. PRs).
  */
 
+const {
+  isVersionBranch,
+  getConfig,
+  assertValidGithubConfig,
+} = require('@angular/dev-infra-private/ng-dev');
+
 if (process.env.CIRCLE_PR_NUMBER) {
   console.info('Skipping notifications for pull requests.');
   process.exit(0);
 }
 
-const {echo, set} = require('shelljs');
 const {
   CIRCLE_JOB: jobName,
   CIRCLE_BRANCH: branchName,
   CIRCLE_BUILD_URL: jobUrl,
   SLACK_COMPONENTS_CI_FAILURES_WEBHOOK_URL: webhookUrl,
 } = process.env;
 
+const {github} = getConfig([assertValidGithubConfig]);
+const isPublishBranch = isVersionBranch(branchName) || branchName === github.mainBranchName;
+
+// We don't want to spam the CI failures channel with e.g. Renovate branch failures.
+if (isPublishBranch === false) {
+  console.info('Skipping notifications for non-publish branches.');
+  process.exit(0);
+}
+
+const {echo, set} = require('shelljs');
+
 const text = `\`${jobName}\` failed in branch: ${branchName}: ${jobUrl}`;
 const payload = {text};
 const [channelName] = process.argv.slice(2);