api: Update proto include paths for Envoy 1.38

Envoy 1.38 renamed external repositories:
- com_github_cncf_xds -> xds
- opentelemetry_proto -> opentelemetry-proto

Update Makefile.api proto include paths accordingly and regenerate
Go gRPC bindings.

Signed-off-by: Tam Mach <tam.mach@cilium.io>

Author: sayboras

Makefile.api

@@ -24,9 +24,9 @@ PROTO_DEPS = \
 	-I bazel-proxy/external/com_google_protobuf/src \
 	-I bazel-proxy/external/com_google_googleapis \
 	-I bazel-proxy/external/com_envoyproxy_protoc_gen_validate \
-	-I bazel-proxy/external/opentelemetry_proto \
+	-I bazel-proxy/external/opentelemetry-proto \
 	-I bazel-proxy/external/prometheus_metrics_model \
-	-I bazel-proxy/external/com_github_cncf_xds \
+	-I bazel-proxy/external/xds \
 	-I bazel-proxy/external/dev_cel/proto
 
 GO_OUT = go