bmw_connected_drive: Add WASHING_FLUID to correct binary sensor attribute

[rikroe]

Proposed change

Allow WASHING_FLUID as binary sensor attribute (but this time, of the right binary sensor).
Repaces/fixes #94762.

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: fixes Missing WASHING_FLUID value for check control message bimmerconnected/bimmer_connected#547
• This PR is related to issue: bmw_conected_drive: Allow WASHING_FLUID in condition based service #94762
• Link to documentation pull request:

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[home-assistant]

Hey there @gerard33, mind taking a look at this pull request as it has been labeled with an integration (bmw_connected_drive) you are listed as a code owner for? Thanks!

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