refactored code according to linting rules and path fixes

buf.gen.yaml

deps/buf.yaml

go.mod

go.sum

...ithub.com/openconfig/gnmi/proto/collector/collector.pb.go

....com/openconfig/gnmi/proto/collector/collector_grpc.pb.go

go/github.com/openconfig/gnmi/proto/gnmi/gnmi.pb.go

go/github.com/openconfig/gnmi/proto/gnmi/gnmi_grpc.pb.go

go/github.com/openconfig/gnmi/proto/gnmi_ext/gnmi_ext.pb.go

go/github.com/openconfig/gnmi/proto/target/target.pb.go

go/github.com/openconfig/gnmi/testing/fake/proto/fake.pb.go

...ub.com/openconfig/gnmi/testing/fake/proto/fake_grpc.pb.go

go/gosdn/core/v1alpha/core.pb.go

go/gosdn/core/v1alpha/core.pb.gw.go

go/gosdn/core/v1alpha/core_grpc.pb.go

go/gosdn/csbi/v1alpha/csbi.pb.go

go/gosdn/csbi/v1alpha/csbi_grpc.pb.go

go/gosdn/pnd/v1alpha/pnd.pb.go

go/gosdn/pnd/v1alpha/pnd.pb.gw.go

go/gosdn/pnd/v1alpha/pnd_grpc.pb.go