Move BMW Target SoC to number platform

[rikroe]

Proposed change

As requested by @MartinHjelmare in #88759 (comment), this PR adds the NUMBER platform to bmw_connected_drive and moves Target SoC there.

No breaking change as #88759 was merged after the last beta cut, so it is not yet live.

Changelog:

• https://github.com/bimmerconnected/bimmer_connected/releases/tag/0.13.1
• https://github.com/bimmerconnected/bimmer_connected/releases/tag/0.13.2

Diff: bimmerconnected/bimmer_connected@0.13.0...0.13.2

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 #
• This PR is related to issue: Add charging features bimmerconnected/bimmer_connected#435, Charge now remote service missing bimmerconnected/bimmer_connected#440
• Link to documentation pull request: BMW: Add EV select documentation home-assistant.io#26365

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
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• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

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• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• Untested files have been added to .coveragerc.

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• I have reviewed two other open pull requests in this repository.

[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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[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[home-assistant]

Hi @rikroe-hera

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Thanks!

[home-assistant]

Hi @rikroe-hera

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Thanks!

[rikroe]

CI fails due to Error: API rate limit exceeded for installation ID 689304

[MartinHjelmare]

Thanks!

[MartinHjelmare]

I added it to the milestone to avoid a breaking change.

[rikroe]

Just removed the string casting as frenck requested in #92199 (comment).
Otherwise no changes.

[frenck]

Thanks, @rikroe 👍

../Frenck