all: more linters (#24783)

This enables the following linters

- typecheck
- unused
- staticcheck
- bidichk
- durationcheck
- exportloopref
- gosec

WIth a few exceptions.

- We use a deprecated protobuf in trezor. I didn't want to mess with that, since I cannot meaningfully test any changes there.
- The deprecated TypeMux is used in a few places still, so the warning for it is silenced for now.
- Using string type in context.WithValue is apparently wrong, one should use a custom type, to prevent collisions between different places in the hierarchy of callers. That should be fixed at some point, but may require some attention.
- The warnings for using weak random generator are squashed, since we use a lot of random without need for cryptographic guarantees.

rpc/client_test.go

@@ -615,10 +615,10 @@ func TestClientReconnect(t *testing.T) {
 	// Start a server and corresponding client.
 	s1, l1 := startServer("127.0.0.1:0")
 	client, err := DialContext(ctx, "ws://"+l1.Addr().String())
-	defer client.Close()
 	if err != nil {
 		t.Fatal("can't dial", err)
 	}
+	defer client.Close()
 
 	// Perform a call. This should work because the server is up.
 	var resp echoResult