Fix: handle unnamed pass parsing in Unity 2021.2.14+

[cabauman]

Description

Fixes #159

Changes made

Check for unnamed pass formatting specific to Unity 2021.2.14+

Notes

Haven't checked what formatting Editor.log and Player.log uses in Unity 2022 and 2023.

Checklist

Before review:

• [ ] Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
• [ ] Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
• [ ] Docs for new/changed API's.
  • Code is annotated using Xmldoc syntax.

[unity-cla-assistant]

All committers have signed the CLA.

[mtrive]

Thanks for this. It took a bit of time because we don't have good shader test coverage for Unity 2021+. It's something we need to improve. Anyway, will merge it for you and update the changelog