extensions: strongly prefer type URL lookup (#20397)

Use type_url to look up extensions. This prevents the undesirable practice of putting invalid protobufs to avoid a type lookup or duplicating the type URL.
Risk Level: medium, affects extensions with duplicated type URLs or no configuration
Testing: yes
Docs Changes: yes, this has been the recommendation for awhile.
Release Notes: yes
Runtime Guard: envoy.reloadable_features.no_extension_lookup_by_name

Signed-off-by: Kuat Yessenov <kuat@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 8cb6862fe6099cd8583a64ff037ecdeaf0e939fa

envoy/config/accesslog/v3/accesslog.proto

@@ -30,9 +30,7 @@ message AccessLog {
 
   reserved "config";
 
-  // The name of the access log extension to instantiate.
-  // The name must match one of the compiled in loggers.
-  // See the :ref:`extensions listed in typed_config below <extension_category_envoy.access_loggers>` for the default list of available loggers.
+  // The name of the access log extension configuration.
   string name = 1;
 
   // Filter which is used to determine if the access log needs to be written.

envoy/config/cluster/v3/filter.proto

@@ -20,12 +20,12 @@ option (udpa.annotations.file_status).package_version_status = ACTIVE;
 message Filter {
   option (udpa.annotations.versioning).previous_message_type = "envoy.api.v2.cluster.Filter";
 
-  // The name of the filter to instantiate. The name must match a
-  // supported upstream filter. Note that Envoy's :ref:`downstream network
-  // filters <config_network_filters>` are not valid upstream filters.
+  // The name of the filter configuration.
   string name = 1 [(validate.rules).string = {min_len: 1}];
 
   // Filter specific configuration which depends on the filter being
   // instantiated. See the supported filters for further documentation.
+  // Note that Envoy's :ref:`downstream network
+  // filters <config_network_filters>` are not valid upstream filters.
   google.protobuf.Any typed_config = 2;
 }

envoy/config/listener/v3/listener_components.proto

@@ -33,8 +33,7 @@ message Filter {
 
   reserved "config";
 
-  // The name of the filter to instantiate. The name must match a
-  // :ref:`supported filter <config_network_filters>`.
+  // The name of the filter configuration.
   string name = 1 [(validate.rules).string = {min_len: 1}];
 
   oneof config_type {
@@ -343,8 +342,7 @@ message ListenerFilter {
 
   reserved "config";
 
-  // The name of the filter to instantiate. The name must match a
-  // :ref:`supported filter <config_listener_filters>`.
+  // The name of the filter configuration.
   string name = 1 [(validate.rules).string = {min_len: 1}];
 
   oneof config_type {

envoy/extensions/filters/network/http_connection_manager/v3/http_connection_manager.proto

@@ -1013,9 +1013,7 @@ message HttpFilter {
 
   reserved "config";
 
-  // The name of the filter configuration. The name is used as a fallback to
-  // select an extension if the type of the configuration proto is not
-  // sufficient. It also serves as a resource name in ExtensionConfigDS.
+  // The name of the filter configuration. It also serves as a resource name in ExtensionConfigDS.
   string name = 1 [(validate.rules).string = {min_len: 1}];
 
   oneof config_type {