Add gazelle directive to stabilize bazel run gazelle

rabbit_common is indirectly included via rabbit_stream_reader.hrl, and
the rules_erlang gazelle extension does not yet know how to detect
this, therefore the directive manually declares it

Author: HoloRin

deps/rabbitmq_auth_backend_oauth2/BUILD.bazel

@@ -50,7 +50,7 @@ rabbitmq_app(
         "//deps/rabbit:erlang_app",
         "@base64url//:erlang_app",
         "@cowlib//:erlang_app",
-        "@jose//:erlang_app"
+        "@jose//:erlang_app",
     ],
 )
 

deps/rabbitmq_stream/app.bzl

@@ -184,5 +184,8 @@ def test_suite_beam_files(name = "test_suite_beam_files"):
         hdrs = ["src/rabbit_stream_reader.hrl"],
         app_name = "rabbitmq_stream",
         erlc_opts = "//:test_erlc_opts",
-        deps = ["//deps/rabbit_common:erlang_app", "//deps/rabbitmq_stream_common:erlang_app"],
+        deps = [
+            "//deps/rabbit_common:erlang_app",  #keep
+            "//deps/rabbitmq_stream_common:erlang_app",
+        ],
     )