cpp_client_telemetry fails to build with CMake 4.0

[DSMitten]

Our repo uses vcpkg to build cpp_client_telemetry with a custom portfile.

Today, we started getting pipeline failures when building the cpp_client_telemetry dependency. The issue is that the repo specifies 3.1 as the minimum cmake required version

CMake 4.0 removes compatibility with versions of CMake <3.5, so the repo will not build successfully until it is updated to specify a minimum version of at least 3.5.