[ring_hash] delegate to pick_first as per dualstack design (grpc#34244)

Rolls forward the changes from grpc#33093 and some from grpc#33568, which were rolled back in grpc#33718.
dazuma · Sep 7, 2023 · a315171 · a315171
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commit a315171
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Showing 4 changed files with 442 additions and 464 deletions.
diff --git a/src/core/BUILD b/src/core/BUILD
@@ -4833,16 +4833,18 @@ grpc_cc_library(
     deps = [
         "channel_args",
         "closure",
+        "delegating_helper",
         "error",
-        "grpc_lb_subchannel_list",
+        "grpc_lb_policy_pick_first",
         "grpc_service_config",
         "json",
         "json_args",
         "json_object_loader",
         "lb_policy",
         "lb_policy_factory",
+        "lb_policy_registry",
+        "pollset_set",
         "ref_counted",
-        "subchannel_interface",
         "unique_type_name",
         "validation_errors",
         "//:channel_arg_names",