maxwell_to_gl: Implement missing primitive topologies

shader/p2r: Implement P2R Pr

vk_image: Add an image object abstraction

vk_staging_buffer_pool: Add a staging pool for temporary operations

gl_rasterizer: Allow rendering without fragment shader

 shader/texture: Implement AOFFI and PTP for TLD4 and TLD4S

Rendering without a fragment shader is usually used in depth-only
passes.

The job of this abstraction is to provide staging buffers for temporary
operations. Think of image uploads or buffer uploads to device memory.

It automatically deletes unused buffers.

This object's job is to contain an image and manage its transitions.
Since Nvidia hardware doesn't know what a transition is but Vulkan
requires them anyway, we have to state track image subresources
individually.

To avoid the overhead of tracking each subresource in images with many
subresources (think of cubemap arrays with several mipmaps), this commit
tracks when subresources have diverged. As long as this doesn't happen
we can check the state of the first subresource (that will be shared
with all subresources) and update accordingly.

Image transitions are deferred to the scheduler command buffer.

fixed_pipeline_state: Define structure and loaders

gl_rasterizer: Implement RASTERIZE_ENABLE

Marks as noexcept Hash, operator== and operator!= for consistency.

The intention behind this hasheable structure is to describe the state
of fixed function pipeline state that gets compiled to a single graphics
pipeline state object. This is all dynamic state in OpenGL but Vulkan
wants it in an immutable state, even if hardware can edit it freely.

In this commit the structure is defined in an optimized state (it uses
booleans, has paddings and many data entries that can be packed to
single integers). This is intentional as an initial implementation that
is easier to debug, implement and review. It will be optimized in later
stages, or it might change if Vulkan gets more dynamic states.

Many of these topologies are exclusively available in OpenGL.

gl_shader_cache: Style changes

vk_resource_manager: Catch device losses and other changes

Texture Cache: Add HLE methods for building 3D textures

vk_shader_decompiler: Misc changes

This commit adds a series of HLE methods for handling 3D textures in
general. This helps games that generate 3D textures on every frame and
may reduce loading times for certain games.

renderer_vulkan/shader: Add helper GLSL shaders

vk_shader_decompiler: Use Visit instead of reimplementing it

shader/memory: Implement LDG.U8 and unaligned U8 loads

Remove false commentary. Not dividing by 4 the size of shared memory is
not a hack; it describes the number of integers, not bytes.

While we are at it sort the generated code to put preprocessor lines on
the top.

ExprCondCode visit implements the generic Visit. Use this instead of
that one.

As an intended side effect this fixes unwritten memory usages in cases
when a negation of a condition code is used.

P2R dumps predicate or condition codes state to a register. This is
useful for unit testing.

shader/conversion: Implement byte selector in I2F

shader/texture: Properly shrink unused entries in size mismatches

Notify the programmer when a request to release a fence is invalid
because the fence is already free.