fix: add netty-codec-haproxy to proxy Bazel deps

Http2ProtocolProxyHandler in proxy uses HAProxyMessageEncoder from
io.netty.handler.codec.haproxy. This was previously available through
the netty-all aggregator, but after switching to explicit submodules
the dependency must be declared.

Add netty_codec_haproxy to both the proxy java_library and the tests
target to silence Bazel strict-deps warnings and ensure consistent
dependency declaration.

Author: qianye1001

proxy/BUILD.bazel

@@ -53,6 +53,7 @@ java_library(
         "@maven//:io_netty_netty_codec",
         "@maven//:io_netty_netty_codec_http",
         "@maven//:io_netty_netty_codec_http2",
+        "@maven//:io_netty_netty_codec_haproxy",
         "@maven//:io_netty_netty_transport_native_epoll",
         "@maven//:io_netty_netty_resolver",
         "@maven//:io_github_aliyunmq_rocketmq_grpc_netty_codec_haproxy",
@@ -113,6 +114,7 @@ java_library(
         "@maven//:io_netty_netty_codec",
         "@maven//:io_netty_netty_codec_http",
         "@maven//:io_netty_netty_codec_http2",
+        "@maven//:io_netty_netty_codec_haproxy",
         "@maven//:io_netty_netty_transport_native_epoll",
         "@maven//:io_netty_netty_resolver",
         "@maven//:io_github_aliyunmq_rocketmq_grpc_netty_codec_haproxy",