Rename test/results to test/_results

This prevents commands like "go test ./..." from looking into it, and it
prevents VS Code's Problems panel from showing errors about the go files in that
folder.

pkg/integration/clients/tui.go

@@ -153,7 +153,7 @@ func RunTUI() {
 			return nil
 		}
 
-		cmd := exec.Command("sh", "-c", fmt.Sprintf("code test/results/%s", currentTest.Name()))
+		cmd := exec.Command("sh", "-c", fmt.Sprintf("code test/_results/%s", currentTest.Name()))
 		if err := cmd.Run(); err != nil {
 			return err
 		}