1942 - Add Cloud Formation Linter check in CI (#2002)

* #1942 Add CI for CloudFormation scripts

- Add new CI for AWS CloudFormation scripts
- Add label 'cfn-templates' on PR
- Add syntax checking of cfn scripts using scottbrenner/cfn-lint-action

* #1942 Remove schedule

No schedule needed for this workflow

* #1942 Add main branche

Co-authored-by: Kevin BEAUGRAND <9513635+kbeaugrand@users.noreply.github.com>

---------

Co-authored-by: Kevin BEAUGRAND <9513635+kbeaugrand@users.noreply.github.com>

.github/workflows/aws-cfn-lint.yml

@@ -0,0 +1,36 @@
+name: Validate CloudFormation templates
+
+on:
+  pull_request:
+    branches: [ main, main-vnext ]
+    paths:
+      - 'templates/aws/**'
+  push:
+    branches: [ main, main-vnext ]
+    paths:
+      - 'templates/aws/**'
+  workflow_dispatch:
+
+jobs:
+  validate_cfn_templates:
+    name: Build and Validate CloudFormation Templates
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Apply cfn-templates label on PR
+        uses: actions/github-script@v6
+        if: ${{ github.event_name == 'pull_request' }}
+        with:
+          script: |
+            github.rest.issues.addLabels({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              labels: ['cfn-templates']
+            })
+      - uses: actions/checkout@v3.4.0
+
+      - name: Check CloudFormation Syntax
+        uses: scottbrenner/cfn-lint-action@v2
+        with:
+          path: templates/aws/