Add workflow to validate the skip qa label (#20997)

* Add workflow to validate the skip qa label

* Add change to argocd to test the message

* Remove change to argocd

Author: AAraKKe

.github/workflows/validate-skip-qa.yml

@@ -0,0 +1,75 @@
+name: 'Validate skip QA label'
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, labeled, unlabeled]
+    branches:
+      - master
+
+jobs:
+  validate-skip-qa:
+    runs-on: ubuntu-latest
+
+    permissions:
+      pull-requests: write
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Get files changed
+        id: changed_files
+        uses: tj-actions/changed-files@ed68ef82c095e0d48ec87eccea555d944a631a4c # v46.0.5
+        with:
+          files: |
+            **/datadog_checks/**
+            **/changelog.d/**
+            **/pyproject.toml
+            **/hatch.toml
+          files_ignore: |
+            ddev/**
+            datadog_checks_dev/**
+            datadog_checks_tests_helper/**
+
+      - name: Post message - Add skip qa label
+        if: steps.changed_files.outputs.any_changed == 'false' && !contains(github.event.pull_request.labels.*.name, 'qa/skip-qa')
+        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043 # v4.0.0
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body: |
+            ⚠️ **Recommendation: Add `qa/skip-qa` Label**
+
+            This PR does not modify any files shipped with the agent.
+
+            To help streamline the release process, please consider adding the `qa/skip-qa` label if these changes do not require QA testing.
+
+      - name: Format file list for comment
+        id: format_files
+        if: steps.changed_files.outputs.any_changed == 'true'
+        run: |
+            formatted_list=$(echo "${{ steps.changed_files.outputs.all_changed_files }}" | tr ' ' '\n')
+            echo "file_list<<EOF" >> $GITHUB_OUTPUT
+            echo "$formatted_list" >> $GITHUB_OUTPUT
+            echo "EOF" >> $GITHUB_OUTPUT
+
+      - name: Post comment - Remove skip qa label
+        if: steps.changed_files.outputs.any_changed == 'true' && contains(github.event.pull_request.labels.*.name, 'qa/skip-qa')
+        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043 # v4.0.0
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body: |
+            ⚠️ **The `qa/skip-qa` label has been added with shippable changes**
+
+            The following files, which will be shipped with the agent, were modified in this PR and
+            the `qa/skip-qa` label has been added.
+
+            You can ignore this if you are sure the changes in this PR do not require QA. Otherwise, consider removing the label.
+
+            <details>
+            <summary>List of modified files that will be shipped with the agent</summary>
+
+            ```
+            ${{ steps.format_files.outputs.file_list }}
+            ```
+
+            </details>