[nightly] Enable GCS HA nightly test with bootstrap (ray-project#21389)

After ray-project#21232 we are able to start ray without redis. We need to bake the test for a while before turning on the flag by default.
This PR add tests for this.

benchmarks/benchmark_tests.yaml

@@ -140,8 +140,9 @@
     script: python distributed/test_many_tasks.py --num-tasks=10000
 
   app_env_vars:
-    RAY_gcs_grpc_based_pubsub: "true"
+    RAY_gcs_grpc_based_pubsub: "1"
     RAY_gcs_storage: "memory"
+    RAY_bootstrap_with_gcs: "1"
 
   stable: false
 
@@ -160,8 +161,9 @@
     script: python distributed/test_many_actors.py
 
   app_env_vars:
-    RAY_gcs_grpc_based_pubsub: "true"
+    RAY_gcs_grpc_based_pubsub: "1"
     RAY_gcs_storage: "memory"
+    RAY_bootstrap_with_gcs: "1"
 
   stable: false
 
@@ -180,8 +182,9 @@
     script: python distributed/test_many_tasks.py --num-tasks=1000
 
   app_env_vars:
-    RAY_gcs_grpc_based_pubsub: "true"
+    RAY_gcs_grpc_based_pubsub: "1"
     RAY_gcs_storage: "memory"
+    RAY_bootstrap_with_gcs: "1"
 
   stable: false
 
@@ -200,7 +203,8 @@
     script: python distributed/test_many_pgs.py
 
   app_env_vars:
-    RAY_gcs_grpc_based_pubsub: "true"
+    RAY_gcs_grpc_based_pubsub: "1"
     RAY_gcs_storage: "memory"
+    RAY_bootstrap_with_gcs: "1"
 
   stable: false