Simplify qbittorrent sensor class init

[chrisx8]

Proposed change

Catch LoginException directly in QBittorrentSensor.__init__.

The exception arg in QBittorrentSensor __init__ is always LoginException, so the arg serves no purpose. Simply catching LoginException directly in __init__ instead achieves the same result.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: N/A
• This PR is related to issue: Add config flow to qBittorrent #82560
• Link to documentation pull request: N/A

Checklist

• The code change is tested and works locally.
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[home-assistant]

Hey there @geoffreylagaisse, mind taking a look at this pull request as it has been labeled with an integration (qbittorrent) you are listed as a code owner for? Thanks!

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