CI: Disable certain labels from becoming stale (ethereum#5655)

* CI: Disable certain labels from being stale

* Add manual merge queue to exempt

* Update stale.yml

.github/workflows/stale.yml

@@ -24,11 +24,13 @@ jobs:
         close-issue-message: This issue was closed due to inactivity. If you are still pursuing it, feel free to reopen it and respond to any feedback.
         days-before-issue-stale: 7
         days-before-issue-close: 49 # 49 + 7 weeks = 3 months
-        exempt-issue-labels: discussions-to
+        exempt-issue-labels: discussions-to, e-consensus
         stale-issue-label: w-stale
         # PR config
         stale-pr-message: There has been no activity on this pull request for 2 weeks. It will be closed after 3 months of inactivity. If you would like to move this PR forward, please respond to any outstanding feedback or add a comment indicating that you have addressed all required feedback and are ready for a review.
         close-pr-message: This pull request was closed due to inactivity. If you are still pursuing it, feel free to reopen it and respond to any feedback or request a review in a comment.
         days-before-pr-stale: 14
         days-before-pr-close: 42 # 42 + 14 weeks = 3 months
+        exempt-pr-labels: e-review, e-consensus
+        exempt-pr-milestones: "Manual Merge Queue"
         stale-pr-label: w-stale