Update module google.golang.org/grpc to v1.73.0

This MR contains the following updates:

Package	Type	Update	Change
google.golang.org/grpc	require	minor	v1.72.1 -> v1.73.0

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Release Notes

grpc/grpc-go (google.golang.org/grpc)

v1.73.0: Release 1.73.0

Compare Source

New Features

• balancer/ringhash: move LB policy from xds/internal to exported path to facilitate use without xds (#​8249)
• xds: enable least request LB policy by default. It can be disabled by setting GRPC_EXPERIMENTAL_ENABLE_LEAST_REQUEST=false in your environment. (#​8253)
• grpc: add a CallAuthority Call Option that can be used to overwrite the http :authority header on per-RPC basis. (#​8068)
• stats/opentelemetry: add trace event for name resolution delay. (#​8074)
• health: added List method to gRPC Health service. (#​8155)
  • Special Thanks: @​marcoshuck
• ringhash: implement features from gRFC A76. (#​8159)
• xds: add functionality to support SPIFFE Bundle Maps as roots of trust in XDS which can be enabled by setting GRPC_EXPERIMENTAL_XDS_MTLS_SPIFFE=true. (#​8167, #​8180, #​8229, #​8343)

Bug Fixes

• xds: locality ID metric label is changed to make it consistent with gRFC A78. (#​8256)
• client: fail RPCs on the client when using extremely short contexts that expire before the grpc-timeout header is created. (#​8312)
• server: non-positive grpc-timeout header values are now rejected. This is consistent with the gRPC protocol spec. (#​8290)
  • Special Thanks: @​evanj
• xds: fix reported error string when LRS load reporting interval is invalid. (#​8224)
  • Special Thanks: @​alingse

Performance Improvements

• credentials/alts: improve read performance by optimizing buffer copies and allocations. (#​8271)
• server: improve performance of RPC handling by avoid a status proto copy (#​8282)
  • Special Thanks: @​evanj

Documentation

• examples/features/opentelemetry: modify example to demonstrate tracing using OpenTelemtry plugin. (#​8056)

v1.72.2: Release 1.72.2

Compare Source

Bug Fixes

• client: restore support for NO_PROXY environment variable when connecting to locally-resolved addresses (case 2 from gRFC A1). (#​8329)
• balancer/least_request: fix panic on resolver errors. (#​8333)

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This MR has been generated by Renovate Bot.

Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this MR as-is.

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• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
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The artifact failure details are included below:

File name: go.sum

Command failed: go get -d -t ./...
go: -d flag is deprecated. -d=true is a no-op
go: downloading google.golang.org/grpc v1.73.0
go: downloading golang.org/x/oauth2 v0.28.0
go: downloading google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463
go: gitlab.software.geant.org/nmaas/nmaas-janitor/pkg/protocol/grpc imports
	gitlab.software.geant.org/nmaas/nmaas-janitor/pkg/api/v1: cannot find module providing package gitlab.software.geant.org/nmaas/nmaas-janitor/pkg/api/v1

mentioned in issue #28