chore: add more information to automatic comments on stale PRs (#33346)

### Issue # (if applicable)

Closes #<issue number here>.

### Reason for this change

Stale PRs get closed and an relatively new contributor may not know why its not being reviewed or what they can do to stop it from being close.



### Description of changes

Adding information on how contributors can stop a stale PR from automatically closing



### Describe any new or updated permissions being added




### Description of how you validated changes



### Checklist
- [ ] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: aaythapa

.github/workflows/close-stale-prs.yml

@@ -23,7 +23,16 @@ jobs:
 
           # Optional
           important-checks-regex: AutoBuildv2Project1C6BFA3F
-          warn-message: This PR has been in the STATE state for 3 weeks, and looks abandoned. To keep this PR from being closed, please continue work on it. If not, it will automatically be closed in a week.
+          warn-message: |
+            This PR has been in the STATE state for 3 weeks, and looks abandoned. Note that PRs with failing linting check or builds are not reviewed, please ensure your build is passing 
+            
+            To prevent automatic closure:
+            - Resume work on the PR
+            - OR request an exemption by adding a comment containing 'Exemption Request' with justification e.x "Exemption Request: <justification>"
+            - OR request clarification by adding a comment containing 'Clarification Request' with a question e.x "Clarification Request: <question>"
+
+            This PR will automatically close in 7 days if no action is taken.
+
           close-message: This PR has been deemed to be abandoned, and will be automatically closed. Please create a new PR for these changes if you think this decision has been made in error.
           skip-labels: contribution/core,pr-linter/do-not-close,pr/needs-maintainer-review,pr-linter/exemption-requested
           close-label: closed-for-staleness