Cleanup: rename some animation-related functions

Rename:
- `BKE_animsys_store_rna_setting` ? `BKE_animsys_rna_path_resolve`
- `BKE_animsys_read_rna_setting` ? `BKE_animsys_read_from_rna_path`
- `BKE_animsys_write_rna_setting` ? `BKE_animsys_write_to_rna_path`

The concept of "RNA setting" is unclear; the new names reflect better
what the functions actually do.

No functional changes.

Cleanup: refactor `BKE_animsys_store_rna_setting()`

Lower the cognitive complexity of `BKE_animsys_store_rna_setting()` by
flipping conditions and using early returns.

No functional changes.

Cleanup: remove superfluous `animsys_evaluate_action_ex()` call

Remove `animsys_evaluate_action()` and rename
`animsys_evaluate_action_ex()` to it. The only function of the former
was to call the latter, with the exact same parameters.

No functional changes.

Add `--open-last` CLI argument that opens the most recent file

Add a CLI argument `--open-last` that opens the most recent file,
effectively doing the same as {key Ctrl Shift O}, {key Enter} after
starting Blender.

When there are no known recent files, print a warning and do nothing,
showing the startup file instead.

Note that this does not try to be smart about restoring the last Blender
session. It just opens the file from disk, as if the user had typed
`blender $(head -n1 ~/.config/blender/2.93/config/recent-files.txt)`.

There is also no smartness when that file cannot be opened; it behaves
exactly the same as typing the most recent filename on the CLI.

Reviewed by: mont29, campbellbarton

Differential Revision: https://developer.blender.org/D10563

Assets: Preview rendering for Action datablocks

Render previews for Action datablocks by rendering the scene camera with
the Workbench (solid) engine. The //look// can be configured by setting
the scene's render engine to Workbench and editing the scene's shading
properties.

It is assumed that the pose has already been applied and that the scene
camera is capturing the pose. In other words, the render function just
renders from the scene camera without evaluating/applying the Action
stored in `preview->id`. The ID is only used to determine its type and
to store the resulting preview.

Not all code paths that lead to the `action_preview_render()` function
actually provide a depsgraph. The "Refresh Asset Preview" button
(`ED_OT_lib_id_generate_preview`) does, but `WM_OT_previews_ensure` does
not.

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D10543

CMake/Deps: Mesa, harvest lib files from new location

The upgraded Mesa (see D10282) stores library files in `mesa/lib64`.

CMake/Deps: Alembic 1.7.16

Version bump + no longer using Boost.

Building Alembic with Boost gave compiler errors, and having one less
inter-dependency is good as well.

Reviewed By: sebbas, sybren

Differential Revision: https://developer.blender.org/D10329

CMake/Deps: OpenImageDenoise 1.2.3 ? 1.3.0

CMake/Deps: upgrade USD 20.05 ? 21.02

USD version 21.02 includes two of the changes Blender used to patch in,
which have now been removed from `usd.diff`. Unfortunately 21.02
introduces another issue where LZ4 symbols are accidentally exported,
causing linker errors. Fortunately these symbols are only used for
resting, so I added a patch hunk that simply removes their `extern "C"`
declaration.

The LZ4 linker issue has been reported upstream at
https://github.com/PixarAnimationStudios/USD/issues/1447.

Reviewed By: sebbas, mont29

Differential Revision: https://developer.blender.org/D10367

CMake/Deps: Alembic 1.7.16

Version bump + no longer using Boost.

Building Alembic with Boost gave compiler errors, and having one less
inter-dependency is good as well.

Reviewed By: sebbas, sybren

Differential Revision: https://developer.blender.org/D10329