fix(deps): Update grpc-java monorepo to v1.68.0

[cq-bot]

This PR contains the following updates:

Package	Type	Update	Change
io.grpc:protoc-gen-grpc-java	dependencies	minor	1.66.0 -> 1.68.0
io.grpc:grpc-testing	dependencies	minor	1.66.0 -> 1.68.0
io.grpc:grpc-netty-shaded	dependencies	minor	1.66.0 -> 1.68.0
io.grpc:grpc-stub	dependencies	minor	1.66.0 -> 1.68.0
io.grpc:grpc-services	dependencies	minor	1.66.0 -> 1.68.0
io.grpc:grpc-protobuf	dependencies	minor	1.66.0 -> 1.68.0

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Release Notes

grpc/grpc-java (io.grpc:protoc-gen-grpc-java)

v1.68.0: MISTAKE

This was supposed to be v1.67.0, but there was a mistake during the release process. This has everything in v1.67.1, except for:

• xds: Fix NullPointerException introduced in "Fix load reporting when pick first is used for locality-routing" (https://github.com/grpc/grpc-java/pull/11553)

v1.67.1

gRPC Java 1.67.1 Release Notes

There was no 1.67.0 release. There was a problem making the release and it went to Maven Central as 1.68.0 instead. This is a version-corrected release.

Improvements

• Petiole load balancing policies (e.g., round_robin, weighted_round_robin, ring_hash, least_request) had internal refactorings. This should not have changed their behavior
• api: Introduce onResult2 in NameResolver Listener2 that returns Status (90d0fab)
• core: touch() buffer when detach()ing (e821d5e). This makes it clearer whether a leak is a gRPC leak or an application leak when the Detachable API is being used
• stub: Add newAttachMetadataServerInterceptor() MetadataUtil (#​11458) (6dbd1b9)
• opentelemetry: GrpcOpenTelemetry now has experimental tracing support. The support can be enabled by setting env var `GRPC_EXPERIMENTAL_ENABLE_OTEL_TRACING=true`. (#​11477) (421e237) (#​11409) (043ba55)
• example: delete duplicate and unused code in KeepAliveClient.java (6a9bc3b)
• example: Added Dualstack example (#​11451) (72a977b)
• xds: Separate xds clients for each channel target, each with its own connection to an xds server. (#​11484) (d034a56)
• xds: Envoy proto sync to 2024-07-06 (#​11401) (96a788a)
• xds: cncf/xds proto sync to 2024-07-24 (#​11417) (0017c98)
• xds: Import RLQS protos (#​11418) (c29763d)
• xds: ClusterManagerLB must update child configuration (10d6002). Previously, RLS configuration would not have been updated

Bug Fixes

• core: Revert "Enable new PickFirst LB (#​11348)" (#​11425) (cc1cbe9)
• util: Stop using SocketAddress.toString() for checking address equality (f866c80). This change applies to all petiole load balancing policies. For regular usages that use dns name resolution, this is unlikely to matter as the default dns name resolver returns consistent addresses. But this might improve LB behavior for some custom load balancers
• xds: Fix load reporting when pick first is used for locality-routing. (#​11495) (1dae144)
• xds: Fix NullPointerException introduced in "Fix load reporting when pick first is used for locality-routing" (#​11553). This change is not present in 1.68.0
• xds: XdsClient should unsubscribe on last resource (#​11264) (448ec4f)
• rls: Fix log statements incorrectly referring to "LRS" (#​11497) (c63e354)

Dependencies

• Upgrade Netty to 4.1.110 and tcnative to 2.0.65 (#​11444) (70ae832)
• examples: Upgrade Maven plugin versions (75012a5)
• Remove direct dependency on j2objc (ff8e413)

Thanks to

@​Juneezee
@​lujiajing1126
@​JarvisCraft
@​sunpe

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