grpc-swift 1.23.1

[BrewTestBot]

Created by brew bump

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Created with brew bump-formula-pr.

release notes

### SemVer Patch

Swift 6-ify the package manifest (#1955)
Fix warnings in SwiftPM plugin (#1958)
Update to protobuf 1.27.0 (#1973)
Improve error message for missing reflection data (#2038)
Use SwiftProtobuf's new CodeGenerator interface (#2043)
Stop using deprecated protobuf API (#2045)
Bump version number to 1.23.1 (#2062)

Other Changes

Manually cleanup unix domain socket path in NIOTS test (#1951)
Add integ test for SwiftPM plugin (#1956)
Move v1 examples to v1 subdirectory (#1963)
Update test certs (#1966)
Fix broken symlinks (#1988)
Update test certs (#1998)
Fix tests to work with unreleased swift-nio changes (#2001)
Add check that generated code is up-to-date (#2013)
Add docc docs for grpc core (#2016)
Use Swift 6 to build docs on Swift Package Index (#2020)
Move examples to top-level (#2024)
Regenerate protos (#2039)
Update plugin bundling script (#2053)

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