dma: add Mem2Mem to support memory to memory transfer

[liebman]

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Submission Checklist 📝

• I have updated existing examples or added new ones (if applicable).
• I have used cargo xtask fmt-packages command to ensure that all changed code is formatted correctly.
• My changes were added to the CHANGELOG.md in the proper section.
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Pull Request Details 📖

Implement memory to memory copy via DMA

Description

Utilize hardware support for memory copy via DMA.

• Internal memory to internal memory
• Resolve how to choose what dma "slot" to use for why see
• Safety information for Mem2Mem::new_unsafe()
• Test on all chips that support GDMA
• Implement safe constructor
• Implement test

External memory support for esp32s3 will be a separate PR.

Testing

new dma_mem2mem example:

• esp32s3
• esp32c2 (esp8684)
• esp32c3
• esp32c6
• esp32h2

[SergioGasquez]

I think we could add a test for this, it could be very very similar to the example. This could be added in this PR or in a following PR.

[liebman]

I think we could add a test for this, it could be very very similar to the example. This could be added in this PR or in a following PR.

Test added

[bjoernQ]

LGTM - Thanks! Feel free to address or ignore the nit-pick comment

[jessebraham]

Thanks, LGTM!

[SergioGasquez]

For some reason, on S3, the new test passes but makes other DMA tests fail and leaves it on a weird state that even subsequent runs fail (unless we erase the flash).

Merge queue action run: https://github.com/esp-rs/esp-hal/actions/runs/9779910668/job/27001936414

We have two options: Investigate the issue and fix it or cfg the mem2mem test for S3 and add the issue in #1524

[liebman]

I think I have a fix - will push shortly.