Bump google.golang.org/grpc from 1.67.1 to 1.68.0 in /notifier/pubsub

[dependabot]

Bumps google.golang.org/grpc from 1.67.1 to 1.68.0.

Release notes

Sourced from google.golang.org/grpc's releases.

Release 1.68.0

Behavior Changes

• stats/opentelemetry/csm: Get mesh_id local label from "CSM_MESH_ID" environment variable, rather than parsing from bootstrap file (#7740)
• orca (experimental): if using an ORCA listener, it must now be registered only on a READY SubConn, and the listener will automatically be stopped when the connection is lost. (#7663)
• client: ClientConn.Close() now closes transports simultaneously and waits for transports to be closed before returning. (#7666)
• credentials: TLS credentials created via NewTLS that use tls.Config.GetConfigForClient will now have CipherSuites, supported TLS versions and ALPN configured automatically. These were previously only set for configs not using the GetConfigForClient option. (#7709)

Bug Fixes

• transport: prevent deadlock in client transport shutdown when writing the GOAWAY frame hangs. (#7662)
• mem: reuse buffers more accurately by using slice capacity instead of length (#7702)
  • Special Thanks: @​PapaCharlie
• status: Fix regression caused by #6919 in status.Details() causing it to return a wrapped type when getting proto messages generated with protoc-gen-go < v1. (#7724)

Dependencies

• Bump minimum supported Go version to go1.22.7. (#7624)

Commits

• acba4d3 Change version to 1.68.0 (#7743)
• 5363dca credentials: Apply defaults to TLS configs provided through GetConfigForClien...
• 056dc64 status: Fix status incompatibility introduced by #6919 and move non-regenerat...
• b79fb61 mem: use slice capacity instead of length, to determine whether to pool buffe...
• 54841ef stats/opentelemetry/csm: Get mesh_id local label from "CSM_MESH_ID" environme...
• ad81c20 pickfirstleaf: minor simplification to reconcileSubConnsLocked method (#7731)
• b850ea5 transport : wait for goroutines to exit before transport closes (#7666)
• 00b9e14 pickfirst: New pick first policy for dualstack (#7498)
• 18a4eac testutils: add couple of log statements to the restartable listener type (#7716)
• fdc2ec2 xdsclient: deflake TestADS_ResourcesAreRequestedAfterStreamRestart (#7720)
• 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 96.9%. Comparing base (a9870ff) to head (b8f8eba).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #550      +/-   ##
========================================
+ Coverage   82.8%   96.9%   +14.1%     
========================================
  Files         62      21      -41     
  Lines       3267    1075    -2192     
========================================
- Hits        2706    1042    -1664     
+ Misses       478      26     -452     
+ Partials      83       7      -76     

see 41 files with indirect coverage changes

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

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