build(deps): bump google.golang.org/grpc from 1.65.0 to 1.78.0 in /examples/xds-sotw-config-server

[dependabot]

Bumps google.golang.org/grpc from 1.65.0 to 1.78.0.

Release notes

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

Release 1.78.0

Behavior Changes

• client: Reject target URLs containing unbracketed colons in the hostname in Go version 1.26+. (#8716)
  • Special Thanks: @​neild

New Features

• stats/otel: Add backend service label to wrr metrics as part of A89. (#8737)
• stats/otel: Add subchannel metrics (without the disconnection reason) to eventually replace the pickfirst metrics. (#8738)
• client: Wait for all pending goroutines to complete when closing a graceful switch balancer. (#8746)
  • Special Thanks: @​twz123

Bug Fixes

• transport/client : Return status code Unknown on malformed grpc-status. (#8735)
• client: Add experimental.AcceptCompressors so callers can restrict the grpc-accept-encoding header advertised for a call. (#8718)
  • Special Thanks: @​iblancasa
• xds: Fix a bug in StringMatcher where regexes would match incorrectly when ignore_case is set to true. (#8723)
• xds/resolver:
  • Drop previous route resources and report an error when no matching virtual host is found.
  • Only log LDS/RDS configuration errors following a successful update and retain the last valid resource to prevent transient failures. (#8711)
• client:
  • Change connectivity state to CONNECTING when creating the name resolver (as part of exiting IDLE).
  • Change connectivity state to TRANSIENT_FAILURE if name resolver creation fails (as part of exiting IDLE).
  • Change connectivity state to IDLE after idle timeout expires even when current state is TRANSIENT_FAILURE.
  • Fix a bug that resulted in OnFinish call option not being invoked for RPCs where stream creation failed. (#8710)
• xdsclient: Fix a race in the xdsClient that could lead to resource-not-found errors. (#8627)

Performance Improvements

• mem: Round up to nearest 4KiB for pool allocations larger than 1MiB. (#8705)
  • Special Thanks: @​cjc25

Release 1.77.0

API Changes

• mem: Replace the Reader interface with a struct for better performance and maintainability. (#8669)

Behavior Changes

• balancer/pickfirst: Remove support for the old pick_first LB policy via the environment variable GRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=false. The new pick_first has been the default since v1.71.0. (#8672)

Bug Fixes

• xdsclient: Fix a race condition in the ADS stream implementation that could result in resource-not-found errors, causing the gRPC client channel to move to TransientFailure. (#8605)
• client: Ignore HTTP status header for gRPC streams. (#8548)
• client: Set a read deadline when closing a transport to prevent it from blocking indefinitely on a broken connection. (#8534)
  • Special Thanks: @​jgold2-stripe

... (truncated)

Commits

• 9df039e Change version to 1.78.0 (#8761)
• 9b990b6 gracefulswitch: Wait for all goroutines on close (#8746)
• 6677d9a xds: Fixing a typo (#8760)
• d35cedd xds/resolver: pass route's auto_host_rewrite to LB picker (gRFC A81) (#8740)
• d931fdc client: allow overriding grpc-accept-encoding header (#8718)
• 0800ec7 xds/clusterimpl: update TestChildPolicyChangeOnConfigUpdate to use custom lb ...
• 6553ea1 stats/otel: Add subchannel metrics (A94) (#8738)
• 81a00ce grpc: Fixing spelling typo (#8756)
• e413838 client: Change connectivity state to CONNECTING when creating the name resolv...
• f9d2bdb stats/otel: Add grpc.lb.backend_service label to wrr metrics (A89) (#8737)
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