chore: update unity project version to unity2022.3.6f1

[pravusjif]

• Updated whole project from Unity 2021.3.22f1 LTS to Unity 2022.3.6f1 LTS
• Updated UberPost shader based on URP 14.0.8. Re-applying our alpha value fix
• Updated CharacterPreview prefab camera background color from white to black to improve avatars blending with the passport screen background
• As per 2022.3.6f1 the annoying "FMOD errors" in the WebGL build should've gone away
• Updated CI images used
• Tried to replace the RenderTargetHandle usages (marked as obsolete since URP 13) with the new RTHandle class but couldn't get it to work. Since in URP 14.0.8 (the one used with Unity 2022.3) the old "obsolete" class still works, I'm leaving that implementation as it was. I created an informative draft PR to tackle that in the future, since probably that change will be mandatory to update the URP version further.

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TESTING

This build should be tested as throroughly as a Release Candidate, and also adding:

• Creating a new avatar from scratch as a guest
• Creating a new avatar from scratch as a non-guest
• Checking if the popular scenes work/look the same way as in production (ICE Poker scene, Wonder Mine, GolfCraft, any other scene that contains video playing)

TEST LINKS

• Web: https://play.decentraland.org/?explorer-branch=test/perf-profiling-unity2022.3.4f1
• Web: https://play.decentraland.zone/?explorer-branch=test/perf-profiling-unity2022.3.4f1
• Desktop: https://renderer-artifacts.decentraland.org/desktop/index.html?dcl://DESKTOP-BRANCH=test/perf-profiling-unity2022.3.4f1

[github-actions]

After the CI passes:

Web

This branch can be previewed at:

• https://play.decentraland.org/?explorer-branch=test/perf-profiling-unity2022.3.4f1
• https://play.decentraland.zone/?explorer-branch=test/perf-profiling-unity2022.3.4f1

Desktop:

If you have the launcher installed (download launcher) you can press open on the following link:

• Open custom protocol
• Open custom protocol with Developer Mode

SDK 6/7:

• Open SDK7 scenes playground
• Open SDK7 scenes in preview
• Open SDK6 scenes in preview

More

• Code coverage report: https://renderer-artifacts.decentraland.org/branch-coverage/test/perf-profiling-unity2022.3.4f1
• Benchmark report: https://renderer-artifacts.decentraland.org/branch-benchmark/test/perf-profiling-unity2022.3.4f1/index.html

[pravusjif]

Rendering bug found: with anti-aliasing disabled (as it is by default for any new user), some submeshes are invisible.

Reproduction steps

1. Enter the onboarding world (https://play.decentraland.org/?explorer-branch=test/perf-profiling-unity2022.3.4f1&realm=dclonboarding.dcl.eth)
2. Make sure anti-alising is off in explorer's graphic settings
3. Notice that several tree cup submeshes are invisible

[pravusjif]

Even after changing usages of DCL/Universal Render Pipeline/ shaders to the original ones from Unity, the bug still happens at the beginning. And these trees haven't been converted to AB so those are not cached Asset Bundles.

antialiasing.bug.mp4

[pravusjif]

Also if Alpha Test keyword is commented-out from our custom shader, the problem stops happening... super weird.

But of course that breaks alpha testing (available through the SDK for materials)