Fix T85886: Rotate Tool and Adjust Last Operation - angles inverted

The constraint was not set when redoing.

This commit also removes `postInputRotation`. I really couldn't see a use for it.

PyAPI Docs: Add 'gpu.state' module

Also exclude `gpu.shader` from quick tests.

Revert "t"

This reverts commit d3a96e5022e121426c8926d0507effe4e9b4005f.

Fix T85823: bpy.ops.transform... ignoring 'center_override' for Bezier control points

`transform_around_single_fallback_ex` ignored that the center could be overwritten.

t

PyAPI: Ensure GIL state only when a callback exists

There are fewer python callbacks than `ARegionType`s.

This also broke GTests's `bf_blenderloader_tests`.

PyAPI: Fix memory leak of parameters used for python 'draw_callbacks'

When closing the blender, while the callbacks are removed, the
reference count of the object used as `customdata` is not decremented.

This commit adds two functions that correctly release the
python `draw_callbacks` before releasing all `draw_callbacks`.

Differential Revision: https://developer.blender.org/D10478

Cleanup: Move some utilities to 'gpu_py.h'

GPU Python: Use 'PyC_ParseStringEnum' to parse items

Currently the GPU module for python has different ways to handle enums.
- Organizing items in `PyC_StringEnumItems` arrays and parsing them with `PyC_ParseStringEnum`.
- Using dedicated functions for each type of enum (`bpygpu_ParsePrimType`, `pygpu_ParseVertCompType` and `pygpu_ParseVertFetchMode`).

Although apparently more efficient (especially `pygpu_ParseVertCompType`
which transforms strings into integers for simple comparison), these
dedicated functions duplicate functionality, increase the complexity of
the code and consequently make it less readable.

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D10456

GPU Python: Rename 'uniform_buffer' to 'uniform_block'

From the the opengl wiki:
> Buffer objects are associated with a program's uniform block similarly to the way that texture objects are associated with sampler uniforms.