Update module google.golang.org/grpc to v1.38.0

go.mod

go.sum

vendor/google.golang.org/grpc/balancer_conn_wrappers.go

vendor/google.golang.org/grpc/clientconn.go

vendor/google.golang.org/grpc/credentials/credentials.go

vendor/google.golang.org/grpc/dialoptions.go

vendor/google.golang.org/grpc/go.sum

...oogle.golang.org/grpc/internal/credentials/credentials.go

vendor/google.golang.org/grpc/internal/internal.go

...gle.golang.org/grpc/internal/resolver/dns/dns_resolver.go

...e.golang.org/grpc/internal/serviceconfig/serviceconfig.go

...r/google.golang.org/grpc/internal/transport/controlbuf.go

...google.golang.org/grpc/internal/transport/http2_client.go

...google.golang.org/grpc/internal/transport/http2_server.go

...or/google.golang.org/grpc/internal/transport/transport.go

.../google.golang.org/grpc/internal/xds_handshake_cluster.go

vendor/google.golang.org/grpc/metadata/metadata.go

vendor/google.golang.org/grpc/regenerate.sh

vendor/google.golang.org/grpc/resolver/resolver.go

vendor/google.golang.org/grpc/resolver_conn_wrapper.go