api filter http: add build rules for go protobufs (#7526)

All http filters have build rules to generate cc protobufs, but not go protobufs. Added build rules (to a few filters) to generate go protobuf files. Emulates the rules in the health_check http filter.

Risk Level: Low

Testing: These rules were copied to google3 and tested internally. Unfortunately, I am having a bit of trouble with bazel build directly on these targets ("Package is considered deleted due to --deleted_packages"). Please let me know if there is a better way to test this change.

Signed-off-by: Teju Nareddy <nareddyt@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 23d82b9d14a6cf9f49ebcd3ae584fe3079f597d1

envoy/config/filter/http/jwt_authn/v2alpha/BUILD

@@ -1,6 +1,6 @@
 licenses(["notice"])  # Apache 2
 
-load("@envoy_api//bazel:api_build_system.bzl", "api_proto_library_internal")
+load("@envoy_api//bazel:api_build_system.bzl", "api_go_proto_library", "api_proto_library_internal")
 
 api_proto_library_internal(
     name = "jwt_authn",
@@ -11,3 +11,13 @@ api_proto_library_internal(
         "//envoy/api/v2/route",
     ],
 )
+
+api_go_proto_library(
+    name = "jwt_authn",
+    proto = ":jwt_authn",
+    deps = [
+        "//envoy/api/v2/core:base_go_proto",
+        "//envoy/api/v2/core:http_uri_go_proto",
+        "//envoy/api/v2/route:route_go_proto",
+    ],
+)

envoy/config/filter/http/router/v2/BUILD

@@ -1,4 +1,4 @@
-load("@envoy_api//bazel:api_build_system.bzl", "api_proto_library_internal")
+load("@envoy_api//bazel:api_build_system.bzl", "api_go_proto_library", "api_proto_library_internal")
 
 licenses(["notice"])  # Apache 2
 
@@ -7,3 +7,9 @@ api_proto_library_internal(
     srcs = ["router.proto"],
     deps = ["//envoy/config/filter/accesslog/v2:accesslog"],
 )
+
+api_go_proto_library(
+    name = "router",
+    proto = ":router",
+    deps = ["//envoy/config/filter/accesslog/v2:accesslog_go_proto"],
+)

envoy/config/filter/http/transcoder/v2/BUILD

@@ -1,4 +1,4 @@
-load("@envoy_api//bazel:api_build_system.bzl", "api_proto_library_internal")
+load("@envoy_api//bazel:api_build_system.bzl", "api_go_proto_library", "api_proto_library_internal")
 
 licenses(["notice"])  # Apache 2
 
@@ -6,3 +6,8 @@ api_proto_library_internal(
     name = "transcoder",
     srcs = ["transcoder.proto"],
 )
+
+api_go_proto_library(
+    name = "transcoder",
+    proto = ":transcoder",
+)