Add passwordConfirmation handling to *Arr general settings models

[Callum027]

Newer versions of the *Arr applications now require a passwordConfirmation attribute to be present in the update API requests for the general settings.

Buildarr's plugins do not support this attribute, which is the cause of the password confirmation errors we're seeing in Radarr and Prowlarr.

buildarr  | send: b'PUT /api/v1/config/host/1 HTTP/1.1\r\nHost: prowlarr:9696\r\nAccept-Encoding: identity\r\nContent-Length: 872\r\nAccept: application/json\r\nContent-Type: application/json\r\nUser-Agent: prowlarr-py/v0.4.1\r\nX-Api-Key: <snip>\r\n\r\n'
buildarr  | send: b'{"id": 1, "bindAddress": "*", "port": 9696, "sslPort": 6969, "enableSsl": false, "launchBrowser": true, "authenticationMethod": "external", "authenticationRequired": "disabledForLocalAddresses", "analyticsEnabled": false, "username": "", "password": "", "logLevel": "debug", "consoleLogLevel": "", "branch": "master", "apiKey": "<snip>", "sslCertPath": "", "sslCertPassword": "", "urlBase": "", "instanceName": "Prowlarr", "applicationUrl": "", "updateAutomatically": false, "updateMechanism": "docker", "updateScriptPath": "", "proxyEnabled": false, "proxyType": "http", "proxyHostname": "", "proxyPort": 8080, "proxyUsername": "", "proxyPassword": "", "proxyBypassFilter": "", "proxyBypassLocalAddresses": true, "certificateValidation": "enabled", "backupFolder": "Backups", "backupInterval": 7, "backupRetention": 28, "historyCleanupDays": 30}'

Update the DevOpsArr Python API libraries to gain support for this parameter (requires Pydantic V2 support on the plugins), and if necessary, add processing on the Buildarr side to make it at least work enough that no errors occur.

[Callum027]

Quickly checking how the username and password fields work in the General Settings, it appears they are transmitted in plaintext to the server.

That means all we should have to do is make sure passwordConfirmation is set to the same value as password, and username/password management should then work correctly in Buildarr.