Fix stubs for buffer types

[aatle]

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Python 3.12 introduced the python-visible buffer protocol with __buffer__ and __release_buffer__. It also defined collections.abc.Buffer. This PR allows static type checkers to recognize some pygame types as buffers, helpful for Surface buffer operations with other libraries like numpy.

Stub changes:

• Add __buffer__() to Sound, BufferProxy, Mask, Color, PixelArray. Also add __release_buffer__() to first three.
• Replace internal image._BufferLike with typing_extensions.Buffer. Replace Sound.__init__() Any and numpy.ndarray overloads with one typing_extensions.Buffer overload.
• Minor change to type of BufferProxy.write() buffer argument