Merge branch 'alex/fix-serialization-metric' into 'master'

chore(crypto): set correct name for the vault's response serialization metric

Vault's serialization metric (message size & serialization time) erroneously uploads its data for the "response" label to the "request" label. This MR sets the right label. 

See merge request dfinity-lab/public/ic!15754

rs/crypto/internal/crypto_service_provider/src/vault/remote_csp_vault/codec.rs

@@ -247,7 +247,7 @@ impl SerializationObserver<Response<TarpcCspVaultResponse>> for CspVaultObserver
             );
             self.metrics.observe_vault_message_serialization(
                 ServiceType::Server,
-                MessageType::Request,
+                MessageType::Response,
                 domain,
                 method_name,
                 number_of_bytes,