- JSON is now generated using the JSON class and includes Godot version
information, CPU information and GPU information. Its base structure
has changed.
- Tweak debug label visibility and mention frame setup time within.
- Tweak code style to follow the GDScript style guide (and fix a typo
in `benchmark_group`).
- Add wall clock time measurement on benchmarks.
- Allow tests to not have a predefined time limit.
- This is required for scripting tests.
- Fix culling tests not reporting GPU time.
