Update credential support

[szszszsz]

This PR adds support for the credentials update, introduced in Nitrokey/trussed-secrets-app#99.

It's possible now to rename the credential, change its touch button use requirement, and change content of the PWS fields.

Builds on #424.

Changes

• add API handling for credential update
• add CLI handling for credential update
• add tests

Checklist

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

• tested with Python3.11
• signed commits
• updated documentation (e.g. parameter description, inline doc, docs.nitrokey)
• added labels

Test Environment and Execution

• OS: Linux Fedora 38
• device's model: USB/IP Sim of Secrets App
• device's firmware version: v0.12.0-10-gf0ac5938, head of 65-update-credential-2.

Relevant Output Example

~/w/pynitrokey (402-update-credential-2|✔) $ ./venv/bin/nitropy nk3 secrets update --help
Command line tool to interact with Nitrokey devices 0.4.39
Usage: nitropy nk3 secrets update [OPTIONS] NAME

  Update credential. Change Static Password fields, or touch button
  requirement attribute.

Options:
  --login TEXT            Password Safe Login
  --password TEXT         Password Safe Password
  --metadata TEXT         Password Safe Metadata - additional field, to which
                          extra information can be encoded
  --touch-button BOOLEAN  Activate/deactivate touch button requirement
  --help                  Show this message and exit.
~/w/pynitrokey (402-update-credential-2|✔) $ ./venv/bin/nitropy nk3 secrets update "CRED ID" --touch-butto
n False
Command line tool to interact with Nitrokey devices 0.4.39
Please touch the device if it blinks
Done
~/w/pynitrokey (402-update-credential-2|✔) $ ./venv/bin/nitropy nk3 secrets list
Command line tool to interact with Nitrokey devices 0.4.39
Please provide PIN to show PIN-protected entries (if any), or press ENTER to skip
Please touch the device if it blinks
Current PIN (8 attempts left):
No PIN provided
01. CRED ID     Hotp/Sha1
02. CRED ID2    Hotp/Sha1
~/w/pynitrokey (402-update-credential-2|✔) $ ./venv/bin/nitropy nk3 secrets update "CRED ID" --touch-butto
n True
Command line tool to interact with Nitrokey devices 0.4.39
Please touch the device if it blinks
Done
~/w/pynitrokey (402-update-credential-2|✔) $ ./venv/bin/nitropy nk3 secrets list
Command line tool to interact with Nitrokey devices 0.4.39
Please provide PIN to show PIN-protected entries (if any), or press ENTER to skip
Please touch the device if it blinks
Current PIN (8 attempts left):
No PIN provided
01. CRED ID     Hotp/Sha1       touch required
02. CRED ID2    Hotp/Sha1
~/w/pynitrokey (402-update-credential-2|✔) $

Fixes #402

Connected:

• Update credential - rename and tests #424
• Support credential update trussed-secrets-app#99

[sosthene-nitrokey]

LGTM, but we should wait to settle on Nitrokey/trussed-secrets-app#99 (comment) before merging.

[szszszsz]

Updates:

• correct test for Credential fields removal
• check if registering with empty slices for PWS fields is forbidden