api: generate whole directory and sync (#9382)

Better tracking new / deleted files. such as aggregate_cluster v3alpha isn't needed.

Risk Level: Low
Testing: CI

Signed-off-by: Lizan Zhou <lizan@tetrate.io>

Mirrored from https://github.com/envoyproxy/envoy @ ec93bfec93a599a18b21b7c04458662960acf81c

envoy/config/cluster/aggregate/v3alpha/BUILD

@@ -1,7 +0,0 @@
-# DO NOT EDIT. This file is generated by tools/proto_sync.py.
-
-load("@envoy_api//bazel:api_build_system.bzl", "api_proto_package")
-
-licenses(["notice"])  # Apache 2
-
-api_proto_package()

envoy/config/cluster/aggregate/v3alpha/cluster.proto

@@ -1,20 +0,0 @@
-syntax = "proto3";
-
-package envoy.config.cluster.aggregate.v3alpha;
-
-option java_outer_classname = "ClusterProto";
-option java_multiple_files = true;
-option java_package = "io.envoyproxy.envoy.config.cluster.aggregate.v3alpha";
-
-import "validate/validate.proto";
-
-// [#protodoc-title: Aggregate cluster configuration]
-
-// Configuration for the aggregate cluster. See the :ref:`architecture overview
-// <arch_overview_aggregate_cluster>` for more information.
-// [#extension: envoy.clusters.aggregate]
-message ClusterConfig {
-  // Load balancing clusters in aggregate cluster. Clusters are prioritized based on the order they
-  // appear in this list.
-  repeated string clusters = 1 [(validate.rules).repeated = {min_items: 1}];
-}