Fixes and workarounds to bring multiple examples to work on WebGPU

[mvaligursky]

Enabled WebGPU for examples:
- post-effects
- clustered area lights
- ground fog

Added support for options.antialias when creating WebGPU device, instead of always using multisampling.

Workarounds:

• on WebGPU we don't have a support for depth buffer resolve with this is multi-sampled. We need to implemented a shader based resolve, to have access to scene depth. For now, in the examples that need scene depth, multisampling has been turned off.
• added workaround for storing multisampled color when the same multisampled buffer is rendered to multiple times. Needs better solution.

Improved render pass logging - moved it from FrameGraph logging to logging during rendering, to log data for render passes that are not part of FrameGraph yet (ad-hoc render passes). This allows us to see render passes from post-effects and similar: