PIV: use se050 backend and trussed-auth for key wrapping

[sosthene-nitrokey]

Depends on

Waiting for merge before updating the patch section of the cargo.toml.

• Add hpke backend trussed-dev/trussed-staging#25
• Implement hpke extension trussed-se050-backend#36
• EcDSA signatures: follow requested serialization format trussed-se050-backend#37
• Encrypt data on external flash piv-authenticator#57

[nitrokey-ci]

metric	value		change
binary-size-nk3am-test	1,957,881	✅	-94,292 (-4.59%)
binary-size-nk3xn-test	564,892	✅	-27,132 (-4.58%)

Insignifcant changes

metric	value		change
binary-size-nk3am	1,441,336	✅	-900 (-0.06%)
binary-size-nk3xn	516,948	✅	-352 (-0.07%)
binary-size-nkpk	748,677	✅	-13 (-0.00%)