Psa cipher chacha20 multipart operation implementation

[Wunderbaeumchen99817]

Contribution description

Adds CHACHA20 multipart glue code

Testing procedure

TBD

Issues/PRs references

N/A

[riot-ci]

Murdock results

:x: FAILED

9472cab06f88e85ac381352751a7712ab4f27f32 fixed a lot of mistakes from rebase

Success	Failures	Total	Runtime
9509	0	10721	12m:41s

Artifacts

[mguetschow]

When you've handled the last outstanding comment, please go ahead and squash directly for a final round of review.

[darthdrannel]

After merge of PR 20720, the sys/psa_crypto/doc.txt should be updated to include the added context in this PR

[Lukas-Luger]

Tests on native and feather-nrf52840-sense checked out OK.

[Lukas-Luger]

After merge of PR 20720, the sys/psa_crypto/doc.txt should be updated to include the added context in this PR

Can you please elaborate what context should be added to the doc?