Remove concurrency settings from Kustomize e2e workflow

- Eliminated the concurrency configuration to simplify the workflow.
- This change aims to streamline the execution of the Kustomize end-to-end tests.

Author: shruthis4

.github/workflows/_run-kustomize-e2e.yaml

@@ -41,10 +41,6 @@ on:
 permissions:
   contents: read
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
   run-kustomize-spark-pi-e2e:
     runs-on: ${{ inputs.runner }}