[NO-TICKET] Fix release tagging with private packages (#2988)

* New private packages broke regex for tags, and I'm making it better

Along with fixing the regex pattern to make it able to not get tripped up by packages that don't have a `@cmsgov` namespace, I made it only match the four design system packages so we reduce the tag noise. This really only removes our private docs package from the tags, but I think that's an improvement.

* Clean up testing output

scripts/release.ts

@@ -18,7 +18,8 @@ function getCurrentBranch() {
 function readLastPublishCommit() {
   const commitHash = getCurrentCommit();
   const commitMessage = sh('git log -1 --pretty=%B');
-  const tags = commitMessage.match(/@.*$/gm);
+  // Only make tags for the actual design system packages
+  const tags = commitMessage.match(/@cmsgov\/(?:design-system@|ds-).*$/gm);
 
   if (!tags) {
     throw Error('The previous commit was not a publish commit. Cannot read tags!');