perf: parametrize runs-on for tf_plan_apply

Author: andhreljaKern

.github/workflows/tf_plan_apply.yml

@@ -7,6 +7,10 @@ on:
         description: 'Generate JWKS'
         default: 'false'
         type: string
+      runs_on:
+        description: 'Runner JSON string'
+        default: 'ubuntu-latest'
+        type: string
 
 # Special permissions required for OIDC authentication
 permissions:
@@ -17,7 +21,7 @@ permissions:
 jobs:
   tofu-plan:
     name: 'OpenTofu Plan'
-    runs-on: [self-hosted, "${{ github.event_name == 'pull_request' && github.event.pull_request.base.ref || github.ref_name }}"]
+    runs-on: ${{ toJson(inputs.runs_on) }}
     environment: ${{ github.event_name == 'pull_request' && github.event.pull_request.base.ref || github.ref_name }}
     env:
       ENVIRONMENT_NAME: ${{ github.event_name == 'pull_request' && github.event.pull_request.base.ref || github.ref_name }}
@@ -87,7 +91,7 @@ jobs:
     name: 'OpenTofu Apply'
     needs: [tofu-plan]
     if: ${{ (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && needs.tofu-plan.outputs.tf-plan-exit-code == 2 }}
-    runs-on: [self-hosted, "${{ github.ref_name }}"]
+    runs-on: ${{ toJson(inputs.runs_on) }}
     environment: ${{ github.ref_name }}
     env:
       ENVIRONMENT_NAME: ${{ github.ref_name }}