Revert to using PAT for writing and deleting images

Author: mering

.github/workflows/test.yml

@@ -7,7 +7,9 @@ on:
 concurrency: testing
 permissions:
   contents: read
-  packages: write
+  # Maxiumum permissions for pull requests from public forked repositories is "read":
+  # See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#permissions-for-the-github_token
+  packages: read
 jobs:
   add_temp_pkgs1:
     name: Add temporary packages for testing
@@ -24,8 +26,8 @@ jobs:
         uses: docker/login-action@v2
         with:
           registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.PAT_TOKEN }}
       - name: lower case repository_owner
         id: lower_case_repository_owner
         uses: ASzc/change-string-case-action@v2
@@ -57,8 +59,8 @@ jobs:
         uses: docker/login-action@v2
         with:
           registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.PAT_TOKEN }}
       - name: lower case repository_owner
         id: lower_case_repository_owner
         uses: ASzc/change-string-case-action@v2
@@ -121,7 +123,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: ./
         with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.PAT_TOKEN }}
           repository_owner: ${{ github.repository_owner }}
           repository: ${{ github.repository }}
           package_name: p1