Update stale issue workflow (#4101)

* Update stale issue workflow

  - Mark issue as stale only if marked with waiting-for-feedback
  - Do not mark issue/PR as stale if mareked with feedback-provided
  - Do not mark issue as stale if assigned to milestone

* Update days-before-stale: 30, days-before-close: 30

Author: ggivo

.github/workflows/stale-issues.yml

@@ -17,9 +17,13 @@ jobs:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         stale-issue-message: 'This issue is marked stale. It will be closed in 30 days if it is not updated.'
         stale-pr-message: 'This pull request is marked stale. It will be closed in 30 days if it is not updated.'
-        days-before-stale: 365
+        days-before-stale: 30
         days-before-close: 30
         stale-issue-label: "stale"
         stale-pr-label: "stale"
         operations-per-run: 10
-        remove-stale-when-updated: false
+        remove-stale-when-updated: true
+        only-labels: 'waiting-for-feedback'
+        exempt-issue-labels: 'feedback-provided'
+        exempt-pr-labels: 'feedback-provided'
+        exempt-all-milestones: true