Blender Git Loki

Cycles: Boiler plate code for the new split kernel functions

The implementation of kernels places in the kernel/integrator folder to
make some distinction between new code being written and the existing.

Currently, all the kernels have a single KernelGlobals argument and an
empty implementation. It would be nice if there is a way to have a
minimal and standard arguments, as it simplifies things in the future.

The new "section" of code is marked as such. Not sure if it's helping
or not, but kind of feels it makes it easier to see functions which
are to be removed or, at least, re-evaluated.

The way how kernels are defined and declared follows the legacy macro,
which I'm not huge fan of, but don't feel like looking into more clear
ways of replacing them is a good time investment at this time. It is
all localized, and doesn't matter too much for the actual code of the
kernels implementation.

Geometry Nodes: move realize-instances code to blenkernel

I need to access this functionality from modifier code. Therefore it should
not be in the nodes module.

Merge branch 'master' into xr-actions-D9124

Fix build error on Linux / gcc

Geometry Nodes: move geometry set instance handling to separate file

In an upcoming commit I'll also move the make-instances-real functionality
to this file. This code is not essential to working with geometry sets in general,
so it makes sense to move it to a separate header.

Geometry Nodes: move some attribute utilities to blenkernel

I need to access these utilities from modifier code as well.
Therefore, they should not live in the nodes module.

Cycles: Remove CPU split kernel declaration

Was missing in the bigger split kernel removal commit.

There are still places in the code which are `ifdef __SPLIT_KERNEL__`
and those are to be removed as well. Although they aren't really in
a way yet.

Cleanup: spelling

Fix add-on & app-template installation logic for overwriting modules

The logic to remove one Python module before installing another
only worked in simple cases where a file replaced a file.

- Installing a single file add-on over a Python package with the same
name caused an error as the directory isn't empty.

- Removing existing module directories from the zip-file did nothing
as the directories from the zip-file that end with a slash were
compared with directories from `os.listdir` that don't.

- `module_filesystem_remove` assumed ZipFile.namelist() was a list of
files in the root of the zip-file when it's a list of all files.

While I couldn't find any bugs caused by this, it performed checks
that don't make sense, comparing files at different depths of the
file-system.

Added poll function to only select multilayer OpenEXRs.

Cleanup: Remove unused constants.

Cleanup: use zero_v3 to clean data.

Moved conversion to layer prefix function to cryptomatte node.

Clean-up: removed comment

Code style: const + naming

Reverted wrong merge: Draw manager render result.

Code-style: reduce indentation.

Codestyle: Spelling in comments.

Cleanup: Split converToOperations in multiple methods.

Code-style: switch statement.