Cloud Service Mesh with a Traffic Director control plane implementation is still incompatible with Envoy version v1.31.0

## Fix Cloud Service Mesh with a Traffic Director control plane implementation is [still](https://cloud.google.com/service-mesh/docs/release-notes#July%5F29%5F2024) incompatible with [Envoy version v1.31.0](https://www.envoyproxy.io/docs/envoy/latest/version%5Fhistory/v1.31/v1.31.0). If you manually control your Envoy version, do not upgrade to v1.31.0 as there is an existing issue with connecting to the Traffic Director API. Instead, upgrade to [Envoy version **1.31.1**](https://www.envoyproxy.io/docs/envoy/latest/version%5Fhistory/v1.31/v1.31.1) where this issue is fixed, or set [GRPC\_DNS\_RESOLVER=native](https://github.com/grpc/grpc/blob/master/doc/environment%5Fvariables.md) for v1.31.0 as a workaround. If you do not manually control your Envoy version, you don't have to do anything. Google's data plane management will not select an incompatible version for you.