* chore: replace `ByteMemoryPool` usage with `MemoryOwner<byte>`
* refactor: `PixelConverter.ConvertR4G4ToR4G4B4A4()` - rename old `outputSpan` to `outputSpanUInt16`, reuse same output `Span<byte>` as newly-freed name `outputSpan`
* eliminate temporary buffer allocations
* chore, perf: use MemoryOwner<byte> instead of IMemoryOwner<byte>
* rebase
* add methods Ryyjinx.Common EmbeddedResources and SteamUtils
* GAL changes - change SetData() methods and ThreadedTexture commands to use IMemoryOwner<byte> instead of SpanOrArray<byte>
* Ryujinx.Graphics.Texture: change texture conversion methods to return IMemoryOwner<byte> and allocate from ByteMemoryPool
* Ryujinx.Graphics.OpenGL: update ITexture and Texture-like types with SetData() methods to take IMemoryOwner<byte> instead of SpanOrArray<byte>
* Ryujinx.Graphics.Vulkan: update ITexture and Texture-like types with SetData() methods to take IMemoryOwner<byte> instead of SpanOrArray<byte>
* Ryujinx.Graphics.Gpu: update ITexture and Texture-like types with SetData() methods to take IMemoryOwner<byte> instead of SpanOrArray<byte>
* Remove now-unused SpanOrArray<T>
* post-rebase cleanup
* PixelConverter: remove unsafe modifier on safe methods, and remove one unnecessary cast
* use ByteMemoryPool.Rent() in GetWritableRegion() impls
* fix formatting, rename `ReadRentedMemory()` to `ReadFileToRentedMemory()``
* Texture.ConvertToHostCompatibleFormat(): dispose of `result` in Astc decode branch
