envoy-windows build fails on release/v1.12 branch when building @envoy_api.

e.g. https://dev.azure.com/cncf/envoy/_build/results?buildId=30582&view=logs&j=2d2b3007-3c5c-5840-9bb0-2b1ea49925f3&t=ac0b0b0f-051f-52f7-8fb3-a7e384b0dde9