Update module google.golang.org/grpc to v1.48.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
google.golang.org/grpc	require	minor	v1.47.0 -> v1.48.0

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Release Notes

grpc/grpc-go

### [`v1.48.0`](https://togithub.com/grpc/grpc-go/releases/tag/v1.48.0) [Compare Source](https://togithub.com/grpc/grpc-go/compare/v1.47.0...v1.48.0) ##### Bug Fixes - xds/priority: fix bug that could prevent higher priorities from receiving config updates ([#​5417](https://togithub.com/grpc/grpc-go/issues/5417)) - RLS load balancer: don't propagate the status code returned on control plane RPCs to data plane RPCs ([#​5400](https://togithub.com/grpc/grpc-go/issues/5400)) ##### New Features - stats: add support for multiple stats handlers in a single client or server ([#​5347](https://togithub.com/grpc/grpc-go/issues/5347)) - gcp/observability: add experimental OpenCensus tracing/metrics support ([#​5372](https://togithub.com/grpc/grpc-go/issues/5372)) - xds: enable aggregate and logical DNS clusters by default ([#​5380](https://togithub.com/grpc/grpc-go/issues/5380)) - credentials/google (for xds): support xdstp C2P cluster names ([#​5399](https://togithub.com/grpc/grpc-go/issues/5399))

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