chore(deps): bump google.golang.org/grpc in /xds-server

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.31.1 to 1.56.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.31.1...v1.56.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

xds-server/go.mod

@@ -4,31 +4,22 @@ go 1.15
 
 require (
 	github.com/asishrs/proxyless-grpc-lb/common v0.0.0-20200824005131-5718db7e19f5
-	github.com/census-instrumentation/opencensus-proto v0.3.0 // indirect
-	github.com/envoyproxy/go-control-plane v0.9.6
-	github.com/envoyproxy/protoc-gen-validate v0.4.1 // indirect
+	github.com/envoyproxy/go-control-plane v0.11.1-0.20230524094728-9239064ad72f
 	github.com/fsnotify/fsnotify v1.4.9 // indirect
-	github.com/golang/protobuf v1.4.2
+	github.com/golang/protobuf v1.5.3
 	github.com/google/gofuzz v1.2.0 // indirect
-	github.com/google/uuid v1.1.1
+	github.com/google/uuid v1.3.0
 	github.com/googleapis/gnostic v0.4.0 // indirect
 	github.com/json-iterator/go v1.1.10 // indirect
-	github.com/kr/pretty v0.2.0 // indirect
 	github.com/magiconair/properties v1.8.2 // indirect
 	github.com/mitchellh/mapstructure v1.3.3 // indirect
 	github.com/pelletier/go-toml v1.8.0 // indirect
 	github.com/spf13/cast v1.3.1 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	go.uber.org/zap v1.15.0
 	golang.org/x/crypto v0.17.0 // indirect
-	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d // indirect
-	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e // indirect
-	google.golang.org/appengine v1.6.6 // indirect
-	google.golang.org/genproto v0.0.0-20200825200019-8632dd797987 // indirect
-	google.golang.org/grpc v1.31.1
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	google.golang.org/grpc v1.56.3
 	gopkg.in/ini.v1 v1.60.1 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
 	k8s.io/apimachinery v0.18.8
 	k8s.io/client-go v11.0.0+incompatible
 	k8s.io/utils v0.0.0-20200821003339-5e75c0163111 // indirect