Remove a bunch of generic params from GpioPin

[bugadani]

• The code compiles without errors or warnings. - even the original code had warnings.
• All examples work. - if they compile, they should work.
• cargo fmt was run.
• Your changes were added to the CHANGELOG.md in the proper section.
• You updated existing examples or added examples (if applicable). - as above.
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• You added proper docs for your newly added features and code. - no new features

PR description

We had a conversation with @MabezDev over at matrix where he mentioned that ideally GPIOs should have fewer generic parameters. Since their capabilities are tied to the hardware, this PR refactors those generic parameters into a companion trait.

[bjoernQ]

Great idea! 👍 We probably can apply this pattern to other drivers, too 🤔

[bugadani]

I haven't used other peripherals yet other than Spi. There, the DMA channel config could maybe be slightly simplified (though I'm not sure about what the SuitablePeripheralX means just yet and if that fits into this or not).

[MabezDev]

This is a really nice PR, and definitely something I want to apply to our other type-heavy structures.

Just one small comment to address and this should be ready to go :)

[bjoernQ]

LGTM