CHORE: Bump grpcio from 1.69.0 to 1.70.0 in the core group

[dependabot]

Bumps the core group with 1 update: grpcio.

Updates grpcio from 1.69.0 to 1.70.0

Release notes

Sourced from grpcio's releases.

Release v1.70.0

This is release 1.70.0 (genius) 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

• [BoringSSL] Update third_party/boringssl-with-bazel. (#38274)

C++

• gRPC C++ begins to require C++17 or later to build and use gRPC C++. You may need the following settings
  • CMake: Add CMAKE_CXX_STANDARD=17 to your CMake build command.
  • Bazel: Add --cxxopt='/std:c++17' and --host_cxxopt='/std:c++17' to your Bazel build command.

Release v1.70.0-pre1

This is a prerelease of gRPC Core 1.70.0 (genius).

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

This prerelease contains refinements, improvements, and bug fixes.

Commits

• 93571f6 [Backport to 1.70.x] Updated python requirements (#38524)
• 9d3bef7 [Revert] "[ruby] [backport-1.70.x] Build/test ruby 3.4 and build native gems ...
• 6788979 [Release] Bump version to 1.70.0 (on v1.70.x branch) (#38509)
• 2d2d80b [Backport] Php & Dart interop test fixes (#38463) (#38507)
• ab2222d [ruby] [backport-1.70.x] Build/test ruby 3.4 and build native gems with Ruby ...
• f1e4dfa [Backport-to-1.70.x] Fix python build script to handle C and C++ std options ...
• 6c8df89 [Release] Bump version to 1.70.0-pre1 (on v1.70.x branch) (#38407)
• 9eb9ebd [Release] Bump core version to 45.0.0 for upcoming release (#38403)
• df95cf9 [benchmark] Match case of excluded scenario. (#38390)
• 048ea42 [CI] Re-enabled modernize-unary-static-assert (#38333)
• Additional commits viewable in compare view

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.63%. Comparing base (95959cc) to head (82e1c30).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1063      +/-   ##
==========================================
+ Coverage   87.59%   87.63%   +0.04%     
==========================================
  Files          36       36              
  Lines        2362     2362              
==========================================
+ Hits         2069     2070       +1     
+ Misses        293      292       -1