Update dependency grpc to v1.74.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
grpc	bazel_dep	minor	1.73.1 -> 1.74.0

Caution

This PR is marked as draft, as some updates cannot be made automatically (e.g. Java Maven deps and Go deps)

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Release Notes

grpc/grpc (grpc)

v1.74.0

This is release 1.74.0 (gee) of gRPC Core.

For gRPC documentation, see grpc.io. For previous releases, see Releases.

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

Core

• [OTel C++, Posix EE] Plumb TCP write timestamps and metrics to OTel tracers. (#​39946)
• [EventEngine] Fix Python reconnect issues: use iomgr backup poller when EE is disabled. (#​39894)
• [Python] Upgrade Pytype (Part - 1). (#​39816)
• [Python] Upgrade black. (#​39774)
• [event_engine] Implement fork support in Posix Event Engine. (#​38980)
• [http2] Fix GRPC_ARG_HTTP2_STREAM_LOOKAHEAD_BYTES for when BDP is disabled. (#​39585)

Objective-C

• [dep] Upgrade Protobuf Version 31.1. (#​39916)

PHP

• [PHP] Fully qualify stdClass with global namespace. (#​39996)
• [php] Fix PHPDoc so that UnaryCall defines the proper return type. (#​37563)
• fix typing of nullable parameters. (#​39199)

Python

• Fix gRPC Python docs website layout - use spaces optimally. (#​40073)

Ruby

• [Ruby] Add rubygems support for linux-gnu and linux-musl platforms . (#​40174)
• [ruby] enable EE fork support. (#​39786)
• [ruby] Return nil for c functions expected to return a VALUE. (#​39214)
• [ruby] remove connectivity state watch thread, fix cancellations from spurious signals. (#​39409)
• [ruby] Drop Ruby 3.0 support. (#​39607)

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