rebase: bump google.golang.org/grpc from 1.47.0 to 1.48.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.47.0 to 1.48.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.47.0...v1.48.0)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/grpc/balancer/base/balancer.go

@@ -45,6 +45,7 @@ func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions)
 		scStates: make(map[balancer.SubConn]connectivity.State),
 		csEvltr:  &balancer.ConnectivityStateEvaluator{},
 		config:   bb.config,
+		state:    connectivity.Connecting,
 	}
 	// Initialize picker to a picker that always returns
 	// ErrNoSubConnAvailable, because when state of a SubConn changes, we
@@ -134,6 +135,9 @@ func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
 		b.ResolverError(errors.New("produced zero addresses"))
 		return balancer.ErrBadResolverState
 	}
+
+	b.regeneratePicker()
+	b.cc.UpdateState(balancer.State{ConnectivityState: b.state, Picker: b.picker})
 	return nil
 }