ci: remove pull request trigger (#116)

Remove PR trigger from release workflow. As we follow a branch based
approach.

Signed-off-by: Heba Elayoty <hebaelayoty@gmail.com>

.github/workflows/publish-gh-image.yml

@@ -5,9 +5,6 @@ on:
       release_version:
         description: 'tag to be created for this image (i.e. vxx.xx.xx)'
         required: true
-  pull_request:
-    types: [ closed ]
-
 
 permissions:
   id-token: write
@@ -21,31 +18,19 @@ env:
 
 jobs:
   check-tag:
-    if: >-
-      github.event_name == 'workflow_dispatch' ||
-      (
-        github.event_name == 'pull_request' &&
-        github.event.pull_request.merged == true && 
-        contains(github.event.pull_request.title, 'update manifest and helm charts')
-       )
     runs-on: ubuntu-latest
-    environment: preset-env
+    environment: e2e-test
     outputs:
       tag: ${{ steps.get-tag.outputs.tag }}
     steps:
       - name: validate version
-        if: github.event_name == 'workflow_dispatch'
         run: |
           echo "${{ github.event.inputs.release_version }}" | grep -E 'v[0-9]+\.[0-9]+\.[0-9]+$'
 
       - id: get-tag
         name: Get tag
         run: |
-          if [[ ${{ github.event_name }} == 'workflow_dispatch' ]]; then
-            echo "tag=$(echo ${{ github.event.inputs.release_version }})" >> $GITHUB_OUTPUT
-          else
-            echo "tag=$(echo ${{ github.event.pull_request.head.ref }} | tr -d release-)" >> $GITHUB_OUTPUT
-          fi
+          echo "tag=$(echo ${{ github.event.inputs.release_version }})" >> $GITHUB_OUTPUT
 
       - name: Checkout
         uses: actions/checkout@v4
@@ -133,13 +118,10 @@ jobs:
       E2E_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
       E2E_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
       E2E_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
-      E2E_AMRT_SECRET_NAME: ${{ secrets.AMRT_SECRET_NAME }}
-      E2E_ACR_AMRT_USERNAME: ${{ secrets.ACR_AMRT_USERNAME }}
-      E2E_ACR_AMRT_PASSWORD: ${{ secrets.ACR_AMRT_PASSWORD }}
 
   publish-mcr-image:
     runs-on: ubuntu-latest
-    environment: preset-env
+    environment: e2e-test
     needs: [ check-tag, run-e2e-gh-image ]
     steps:
       - name: 'Dispatch release tag'