Revert "[test] Disable end2end tests for the EventEngine listener experiment" (#33100)

Reverts grpc/grpc#32968

bazel/experiments.bzl

@@ -25,6 +25,7 @@ EXPERIMENTS = {
         ],
         "core_end2end_test": [
             "event_engine_client",
+            "event_engine_listener",
             "promise_based_client_call",
             "promise_based_server_call",
         ],

src/core/lib/experiments/experiments.yaml

@@ -128,7 +128,7 @@
   default: false
   expiry: 2023/06/13
   owner: vigneshbabu@google.com
-  test_tags: ["event_engine_listener_test"]
+  test_tags: ["core_end2end_test", "event_engine_listener_test"]
 - name: schedule_cancellation_over_write
   description: Allow cancellation op to be scheduled over a write
   default: false