feat: add matrix provider to e2e test concurrency

This change updates the GitHub Actions workflow to include the provider
in the concurrency group for e2e tests. This ensures that tests are
properly grouped and managed based on the provider, preventing conflicts
and improving test reliability.

Fix a backslash missing

.github/workflows/kind-e2e-tests.yaml

@@ -18,7 +18,7 @@ on:
 jobs:
   e2e-tests:
     concurrency:
-      group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+      group: ${{ github.workflow }}-${{ matrix.provider }}-${{ github.event.pull_request.number || github.ref }}
       cancel-in-progress: true
     name: e2e tests
     runs-on: ubuntu-latest
@@ -81,7 +81,7 @@ jobs:
       - name: Run E2E Tests on pull_request
         if: ${{ github.event_name != 'schedule' }}
         run: |
-          ./hack/gh-workflow-ci.sh run_e2e_tests
+          ./hack/gh-workflow-ci.sh run_e2e_tests \
            ${{ matrix.provider }} \
            "${{ secrets.BITBUCKET_CLOUD_TOKEN }}" \
            "${{ secrets.WEBHOOK_SECRET }}" \
@@ -98,7 +98,7 @@ jobs:
         if: ${{ github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' }}
         run: |
           export NIGHTLY_E2E_TEST="true"
-          ./hack/gh-workflow-ci.sh run_e2e_tests
+          ./hack/gh-workflow-ci.sh run_e2e_tests \
            ${{ matrix.provider }} \
            "${{ secrets.BITBUCKET_CLOUD_TOKEN }}" \
            "${{ secrets.WEBHOOK_SECRET }}" \