feat(terraform): add option to run Apply on condition (#582)

.github/workflows/terraform.yml

@@ -41,6 +41,12 @@ on:
         type: string
         required: false
 
+      run_terraform_apply:
+        description: Run `terraform apply` for the saved plan file?
+        type: boolean
+        required: false
+        default: true
+
     secrets:
       AZURE_CLIENT_ID:
         description: The client ID of the Azure AD service principal to use for authenticating to Azure.
@@ -223,7 +229,7 @@ jobs:
   terraform-apply:
     name: Terraform Apply
     needs: terraform-plan
-    if: github.actor != 'dependabot[bot]' && needs.terraform-plan.outputs.upload-outcome == 'success'
+    if: github.actor != 'dependabot[bot]' && needs.terraform-plan.outputs.upload-outcome == 'success' && inputs.run_terraform_apply
     runs-on: ${{ inputs.runs_on }}
     environment: ${{ inputs.environment }}
     permissions: