recvfd server leaks files, memory both in networkservice and registry chains

[Bolodya1997]

Expected Behavior

recvfd should correctly close all per-Connection / Endpoint data and files on timeout Close.

Current Behavior

recvfd server leaks per-Connection data and files on timeout Close.

Issue in code

In timeout case there is no grpc.Peer in context, so recvfd server doesn't make any cleanup actions.

sdk/pkg/networkservice/common/mechanisms/recvfd/server.go

Lines 81 to 85 in dd436eb

	// Get the grpcfd.FDRecver
	recv, ok := grpcfd.FromContext(ctx)
	if !ok {
	return next.Server(ctx).Close(ctx, conn)
	}

Same for expire:

sdk/pkg/registry/common/recvfd/server.go

Lines 101 to 105 in dd436eb

	// Get the grpcfd.FDRecver
	recv, ok := grpcfd.FromContext(ctx)
	if !ok {
	return next.NetworkServiceEndpointRegistryServer(ctx).Unregister(ctx, endpoint)
	}