gRPC-Core Release 1.76.0

[Sergii Tkachenko]

This is 1.76.0 (genuine) release announcement for gRPC-Core and the wrapped languages C++, C#, Objective-C, Python, PHP and Ruby. Latest release notes are here.

This release contains refinements, improvements, and bug fixes, with highlights listed below.

Core

• Prioritize system CA over bundled CA. (#40583)
• [event_engine] Introduce a event_engine_poller_for_python experiment. (#40243)
• [metrics] add grpc.lb.backend_service label. (#40486)

C#

• [csharp tools] #39374 Grpc.Tools can't process file Suffix name with Upper character. (#40072)

Python

• [Python] gRPC AsyncIO: Improve CompletionQueue polling performance. (#39993)