[FR] Use Read token on branch status checks (#2598)

.github/workflows/backport.yml

@@ -69,6 +69,7 @@ jobs:
         with:
           token: ${{ secrets.PROTECTIONS_MACHINE_TOKEN }}
           ref: main
+          fetch-depth: 100
 
       - name: Set github config
         run: |
@@ -77,7 +78,6 @@ jobs:
 
       - name: Get branch histories
         run: |
-          git fetch origin main --depth 100
           git fetch origin ${{matrix.target_branch}} --depth 1
           git status
           git log -1 --format='%H'

.github/workflows/branch-status-checks.yml

@@ -22,6 +22,7 @@ jobs:
       with:
         url: "https://api.github.com/repos/elastic/detection-rules/actions/workflows/pythonpackage.yml/runs?per_page=1&branch=${{matrix.target_branch}}"
         method: 'GET'
+        bearerToken: ${{ secrets.READ_ORG_TOKEN }}
 
     - name: Check Backport Status
       uses: actions/github-script@v6