Update to go-kms-wrapping version 2, and plugin-based KMS (#1901)

tools/tools.go

@@ -21,7 +21,6 @@ package tools
 //go:generate go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2
 //go:generate go install golang.org/x/tools/cmd/goimports
 //go:generate go install github.com/oligot/go-mod-upgrade
-//go:generate go install github.com/mitchellh/gox
 //go:generate go install google.golang.org/protobuf/cmd/protoc-gen-go
 //go:generate go install google.golang.org/grpc/cmd/protoc-gen-go-grpc
 
@@ -40,8 +39,6 @@ import (
 
 	_ "github.com/oligot/go-mod-upgrade"
 
-	_ "github.com/mitchellh/gox"
-
 	_ "google.golang.org/protobuf/cmd/protoc-gen-go"
 
 	_ "google.golang.org/grpc/cmd/protoc-gen-go-grpc"