protos: Readd v2 legacy protos in v3 (#16338)

Signed-off-by: Ryan Northey <ryan@synca.io>

Mirrored from https://github.com/envoyproxy/envoy @ f06269d02cb36686a2a1db777a15b70bb3229e29

BUILD

@@ -133,12 +133,18 @@ proto_library(
         "//envoy/config/common/matcher/v3:pkg",
         "//envoy/config/core/v3:pkg",
         "//envoy/config/endpoint/v3:pkg",
+        "//envoy/config/filter/thrift/router/v2alpha1:pkg",
         "//envoy/config/grpc_credential/v3:pkg",
+        "//envoy/config/health_checker/redis/v2:pkg",
         "//envoy/config/listener/v3:pkg",
         "//envoy/config/metrics/v3:pkg",
         "//envoy/config/overload/v3:pkg",
         "//envoy/config/ratelimit/v3:pkg",
         "//envoy/config/rbac/v3:pkg",
+        "//envoy/config/resource_monitor/fixed_heap/v2alpha:pkg",
+        "//envoy/config/resource_monitor/injected_resource/v2alpha:pkg",
+        "//envoy/config/retry/omit_canary_hosts/v2:pkg",
+        "//envoy/config/retry/previous_hosts/v2:pkg",
         "//envoy/config/route/v3:pkg",
         "//envoy/config/tap/v3:pkg",
         "//envoy/config/trace/v3:pkg",