[Core] Split gcs into smaller targets (ray-project#50764)

Signed-off-by: fscnick <fscnick.dev@gmail.com>

BUILD.bazel

@@ -2678,33 +2678,28 @@ ray_cc_test(
 )
 
 ray_cc_library(
-    name = "gcs",
+    name = "gcs_pb_util",
     srcs = [
         "//:src/ray/gcs/pb_utils.cc",
-        "//:src/ray/gcs/redis_async_context.cc",
-        "//:src/ray/gcs/redis_client.cc",
-        "//:src/ray/gcs/redis_context.cc",
     ],
     hdrs = [
         "//:src/ray/gcs/pb_util.h",
-        "//:src/ray/gcs/redis_async_context.h",
-        "//:src/ray/gcs/redis_client.h",
-        "//:src/ray/gcs/redis_context.h",
     ],
+    deps = [
+        ":ray_common",
+        "//src/ray/protobuf:autoscaler_cc_proto",
+    ],
+)
+
+ray_cc_library(
+    name = "gcs",
     deps = [
         ":gcs_callback",
-        ":hiredis",
         ":node_manager_fbs",
         ":node_manager_rpc",
-        ":ray_common",
-        ":stats_lib",
-        "//src/ray/protobuf:agent_manager_cc_proto",
-        "//src/ray/protobuf:gcs_cc_proto",
-        "//src/ray/protobuf:gcs_service_cc_proto",
-        "//src/ray/util",
-        "//src/ray/util:exponential_backoff",
-        "@boost//:asio",
-    ],
+        ":gcs_pb_util",
+        ":redis_client",
+    ]
 )
 
 ray_cc_test(