feat: update NetHSM api client

[nponsard]

This PR updates the NetHSM api client to the latest specification.

Changes

• [x] Update nethsm-api.yml file
• [x] Update /pynitrokey/nethsm/client folder
• [x] Update api calls in /pynitrokey/nethsm/init.py

Checklist

Make sure to run make check and make fix before creating a PR, otherwise the CI will fail.

• [ ] tested with Python3.9
• [ ] signed commits
• [ ] updated documentation (e.g. parameter description, inline doc, docs.nitrokey)
• [ ] added labels

Test Environment and Execution

• OS:
• device's model:
• device's firmware version:

[nponsard]

I need to test all the functions to check if the type changed / something broke :

• [ ] add-key
• [x] add-key-tag
• [x] add-operator-tag
• [x] add-user
• [ ] backup
• [ ] cancel-update
• [ ] commit-update
• [ ] csr
• [ ] decrypt
• [ ] delete-certificate
• [x] delete-key
• [x] delete-key-tag
• [x] delete-operator-tag
• [x] delete-user
• [ ] encrypt
• [ ] factory-reset
• [x] generate-key
• [x] generate-tls-key
• [ ] get-certificate
• [ ] get-config
• [x] get-key
• [x] get-user
• [x] info
• [x] list-keys
• [x] list-operator-tags
• [x] list-users
• [x] lock
• [x] metrics
• [ ] provision
• [ ] random
• [ ] reboot
• [ ] restore
• [ ] set-backup-passphrase
• [ ] set-certificate
• [ ] set-logging-config
• [ ] set-network-config
• [ ] set-passphrase
• [ ] set-time
• [ ] set-unattended-boot
• [ ] set-unlock-passphrase
• [ ] shutdown
• [ ] sign
• [x] state
• [x] system-info
• [x] unlock
• [x] update

[nponsard]

There's problems with the latest versions of the code generators, I'm gonna try with an older version.