Rename fritz coordinator module

[epenet]

Proposed change

SSIA, linked to #108174

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

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• This PR fixes or closes issue: fixes #
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[home-assistant]

Hey there @mammuth, @AaronDavidSchneider, @chemelli74, @mib1185, mind taking a look at this pull request as it has been labeled with an integration (fritz) you are listed as a code owner for? Thanks!

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[chemelli74]

Any issue with the PR ? Sounds good as approach

[epenet]

Coverage on the coordinator was lower than I expected, but if you can help with the testing we can move it forward.

[chemelli74]

LGTM, Thx !