Add variable for local test focus

prow.sh

@@ -359,6 +359,10 @@ configvar CSI_PROW_E2E_ALPHA_GATES "$(get_versioned_variable CSI_PROW_E2E_ALPHA_
 configvar CSI_PROW_E2E_GATES_LATEST '' "non alpha feature gates for latest Kubernetes"
 configvar CSI_PROW_E2E_GATES "$(get_versioned_variable CSI_PROW_E2E_GATES "${csi_prow_kubernetes_version_suffix}")" "non alpha E2E feature gates"
 
+# Focus for local tests run in the sidecar E2E repo. Only used if CSI_PROW_SIDECAR_E2E_IMPORT_PATH
+# is not set to "none". If empty, all tests in the sidecar repo will be run.
+configvar CSI_PROW_SIDECAR_E2E_FOCUS '' "tags for local E2E tests"
+
 # Which external-snapshotter tag to use for the snapshotter CRD and snapshot-controller deployment
 default_csi_snapshotter_version () {
 	if [ "${CSI_PROW_KUBERNETES_VERSION}" = "latest" ] || [ "${CSI_PROW_DRIVER_CANARY}" = "canary" ]; then
@@ -1328,8 +1332,8 @@ main () {
 
                 if sidecar_tests_enabled; then
                     if ! run_e2e local \
-                         -focus="some regex"; then
-                        warn "Local e2e tests failed"
+                         -focus="${CSI_PROW_SIDECAR_E2E_FOCUS}"; then
+                        warn "E2E sidecar failed"
                         ret=1
                     fi
                 fi