chore(ci-wait-for-all): Use Ana06/get-changed-files to compare PRs …

…with `main` (#3158)



#### Summary

~~It seems this action fails to use the correct `sha` of the PR if the PR branch is not up to date. This should fix it~~

Use an action that uses the GitHub API as we need a three dots diff

<!--

.github/workflows/wait_for_required_workflows.yml

@@ -11,14 +11,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v32
+        uses: Ana06/get-changed-files@v2.1.0
       - uses: actions/github-script@v6
         env:
-          FILES: ${{ steps.changed-files.outputs.all_changed_files }}
+          FILES: ${{ steps.changed-files.outputs.all }}
         with:
           script: |
             const files = process.env.FILES.split(' ')