Audio buffer view improvements (#8016)

- Add `SampleType` concept
- Make `channels()` static when possible
- Add `dataSizeBytes()` and `dataView()` to `InterleavedBufferView`
- Support conversions between `std::span<SampleFrame>` and `InterleavedBufferView<float, 2>`
- Support iteration over frames of `InterleavedBufferView`
- Add `subspan` method
- Add `AudioBufferView` concept

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Co-authored-by: Sotonye Atemie <[email protected]>

Author: messmerd