Blender Git Loki

Fluid: Updated Mantaflow source files

Includes update for OpenVDB file IO, i.e. fixes an issue with
compression flag combination that resulted in random segfaults.

Other changes: Cleanup and formatting.

Cycles: Writing texture cache stats through VLOG not std::cout.

Fix T88313: GPencil reproject operator projecting on the wrong surface

`ray_start` must start at the position of the gpencil point.

USD import: format fixes.

Merging latest from branch nv-usd-importer.

USD import: creater readers for untyped prims.

Added code to handle less common case where the USD prim
has no type specified (seen in some legacy USDs). We still
want to import such prims in order to access their descendents.

Add support for float2, float3, color, and instance columns

Alembic: read/write generated coordinates of meshes

Read and write generated coordinates (also known as "original
coordinates", "reference coordinates", or "orcos") from and to Alembic.
A custom geometry property named "Pref" is used for (hopefully)
interoperability with Maya and Houdini. For now it's only guaranteed for
Blender-to-Blender.

Export: writing generated coordinates is optional (on by default).

Import: generated coordinates are always read whenever the reading of
vertex data is enabled.

Manifest Task: T88081

Bulk commit of current override recursive resync.

Mostly to get test builds for artists, code seems to be working, but
final commit will need to be split, and there is some cleanup to be done
first anyway.

Cleanup: typo in comment.

Fix ID copying outside of Main affecting 'directly linked' status of other IDs.

Copying an ID outside of BMain should not assume that the datablocks it
uses are now directly linked. This would be wrong e.g. in case that new
no-main ID is copied from a linked data-block and is supposed to remain
a linked data.

Merge branch 'master' into greasepencil-object

Merge branch 'master' into temp-spreadsheet-row-filter

Cycles X: Implement early cancel in GPU rendering

Allow the GPU rendering to stop rendering before all scheduled paths
has been terminated. This significantly lowers latency of the viewport
navigation.

With some files from the Sprites Fright project the time spend in the
`PathTrace::cancel()` is reduced from 0.6 to below 0.01 sec.

Differential Revision: https://developer.blender.org/D11286

Fix T88362: Lineart countour rendering error

Merge branch 'blender-v2.93-release'

Lineart: Cache toggle for baking operators.

LineArt: UI grey out for cache mode.

LineArt: Global overrides for cached calculation.

LineArt: Fix cache allocation error.