gRPC-Core Release 1.71.0

[Eugene Ostroukhov]

This is 1.71.0(gears) release announcement for gRPC-Core and the wrapped languages C++, C#, Objective-C, Python, PHP and Ruby. Latest release notes are here.

Core

• [CallAttemptTracer] Fix call attempt tracer lifetimes for retries (#38729). (#38796)
• [pick_first] fix bug that caused us to stop triggering connection attempts. (#38714)
• [CodeGen][CPP] Added support for service "deprecated" option. (#38493)
• [EventEngine] Add SetDefaultEventEngine API (and friends). (#38316)

C++

• [build] Restrict grpc++_public_hdrs target to internal visibility. (#38646)
• [Doc] Added C++17 cmake option. (#38432)

Python

• [CI] Drop Python 3.8. (#38747)
• [Python] Support musl-linux binary wheels on arm64. (#38223)

Ruby

• [ruby] Build/test ruby 3.4 and build native gems with Ruby 3.4 support. (#38338)