Fix T77561 EEVEE: Refraction BSDF is using world probe during glossy bake

This fixes light leaking during baking indoor environment when using
refraction bsdfs.

Cycles: Fix compilation error and warning without OPENVDB

Fix T81827: MacOS lines that should be thick are green instead

The issue was the use of alpha values of 0 when there were no blending
enabled.

This patch just disables the smoothing of the wires in this case.

Fix T82220 Missing viewport update after manual "HDRI Preview Size" input

This is caused by the TAA being reset after the init phase, leading to
1 sample being kept as valid when it is clearly not.

To fix this, we run the lookdev validation before TAA init.

Reviewed By: Jeroen Bakker

Differential Revision: https://developer.blender.org/D9452

Fix T82220 Missing viewport update after manual "HDRI Preview Size" input

This is caused by the TAA being reset after the init phase, leading to
1 sample being kept as valid when it is clearly not.

To fix this, we run the lookdev validation before TAA init.

Reviewed By: Jeroen Bakker

Differential Revision: https://developer.blender.org/D9452

Merge branch 'blender-v2.91-release' into master

Fix T80842 Grease Pencil: Subtract mode is not working as expected

The blend equation was not set correctly inside the GL Module
since the refactor.

Fix T81752 EEVEE: Camera Motion Blur is not blending steps properly

This was due to improper calculation of velocity factor and an
error in the camera data swapping between two steps.

Fix T73126 Eevee: light probe baking ignores indirect bounces from SSS

Fix T82385 EEVEE: Alpha Clip shadows actually using Alpha Hashed shadows

The shadow path was not using the alpha threshold.