build(deps): bump google.golang.org/grpc from 1.47.0 to 1.48.0 in /api/v2

[dependabot[bot]]

Bumps google.golang.org/grpc from 1.47.0 to 1.48.0.

Release notes

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

Release 1.48.0

Bug Fixes

• xds/priority: fix bug that could prevent higher priorities from receiving config updates (#5417)
• RLS load balancer: don't propagate the status code returned on control plane RPCs to data plane RPCs (#5400)

New Features

• stats: add support for multiple stats handlers in a single client or server (#5347)
• gcp/observability: add experimental OpenCensus tracing/metrics support (#5372)
• xds: enable aggregate and logical DNS clusters by default (#5380)
• credentials/google (for xds): support xdstp C2P cluster names (#5399)

Commits

• 6417495 Change version to 1.48.0 (#5482)
• 5770b1d xds: drop localities with zero weight at the xdsClient layer (#5476)
• 423cd8e interop: update proto to make vet happy (#5475)
• c9b16c8 transport: remove unused bufWriter.onFlush() (#5464)
• 755bf5a fix typo in the binary log (#5467)
• 15739b5 health: split imports into healthpb and healthgrpc (#5466)
• c075d20 interop client: provide new flag, --soak_min_time_ms_between_rpcs (#5421)
• 4b75005 clusterresolver: merge P(p)arseConfig functions (#5462)
• d883f3d test/xds: fail only when state changes to something other than READY and IDLE...
• c6ee1c7 xdsclient: only include nodeID in error strings, not the whole nodeProto (#5461)
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