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Cleanup: GPU: Remove GPU_shaderinterface_uniform_ensure

DRW: Remove defered uniform creation

OCIO: GLSL: Avoid undefined behavior

Set ubo binding after shaderinterface creation as GPU_shaderinterface_create
will call glUniformBlockBinding.

Calculate normals from collision triangles using the closest point

Depsgraph: Remove unneeded `RNA_path_resolve`

Found during research of {T77124}. In `build_driver_data` an identical
RNA_path is resolved twice. In stead of resolving it twice this patch
will construct the `property_exit_key` based on the resolution of
`property_entry_key`.

This change isn't noticeable for users. Just a cleanup as it isn't
needed to do the same logic twice.

Reviewed By: Sergey Sharybin

Differential Revision: https://developer.blender.org/D7872

BVHCache: Performance

This patch changes the BVHCache implementation. It will use
a primitive array in stead of the ListBase. The locking is also
changed from a global lock to a per cache instance lock.

The performance of `gabby.blend` available on the cloud increased from 9.7
fps to 10.5 fps.

Reviewed By: Brecht van Lommel

Differential Revision: https://developer.blender.org/D7817

DrawManager: Graph Task Scheduling

This patch uses a graph flow scheduler for creating all mesh batches.
On a Ryzen 1700 the framerate of Spring/020_02A.anim.blend went from 10 fps to 11.5 fps.

For each mesh where batches needs to be updated a sub-graph will be added to the task_graph.
This sub-graph starts with an extract_render_data_node. This fills/converts the required data
from Mesh.

Small extractions and extractions that can't be multi-threaded are grouped in a single
`extract_single_threaded_task_node`.

Other extractions will create a node for each loop exceeding 4096 items. these nodes are
linked to the `user_data_init_task_node`. the `user_data_init_task_node` prepares the userdata
needed for the extraction based on the data extracted from the mesh.

Note: If the `lines` and `lines_loose` are requested, the `lines_loose` sub-buffer is created
as part of the lines extraction. When the lines_loose is only requested the sub-buffer is
created from the existing `lines` buffer. It is assumed that the lines buffer is always
requested before or together with the lines_loose what is always the case (see
`DRW_batch_requested(cache->batch.loose_edges, GPU_PRIM_LINES)` in `draw_cache_impl_mesh.c`).

Reviewed By: Cl�ment Foucault

Differential Revision: https://developer.blender.org/D7618

Fix T66967: skin modifier crash scaling skin radius to zero

Turn most flags in BlenderDefRNA into proper bool.

Cleanup: RNA: use `BlenderDefRNAtruct` named members initialization.

Minor cleanup.

Merge branch 'master' into undo-write

GPU: ShaderInterface: Refactor to setup all uniform at creation time

This remove the complexity of queriying the locations at runtime and
allows for more performance and upfront binding specifications.

The benefit of doing everything at creation time is that we can assign binding
points in a predictable order which is going to be somewhat the same for
every similar shader.

This also rewrite GPU_vertformat_from_shader to not use shaderface.

This is to keep the shaderface simple. If it becomes necessary to not query
the shader after creation (i.e: vulkan?) we could just create the vert
format in advance at compilation for PyGPU shaders.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7879

GPU: Texture: Replace internal sampler state by explicit state object

This makes it easier to track as well as allowing us to sample the same
texture with different sampling parameters (which should fix the related
T73942 in the long run).

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7831

Merge branch 'blender-v2.83-release'

Fix T76533: Gizmo uses active face center in edge selection mode

Only use the active face when it's selected.

Merge branch 'blender-v2.83-release'

Cleanup: use C++'s nullptr instead of our own C NULL define, in C++ code.