Add device tracker platform to Renault integration

[epenet]

Breaking change

Extra state attribute last_update has been normalised to UTC

Proposed change

Add device tracker platform to Renault integration, as follow up to #39605

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)
• 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: New Renault Integration 2021.8 problems #54010
• Link to documentation pull request: Add device tracker platform to Renault integration home-assistant.io#18960

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
• 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

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

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To help with the load of incoming pull requests:

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[epenet]

Will need to be rebased after #55230

[epenet]

Will need to be rebased after #55313

[epenet]

Rebased following merge of #55454

[MartinHjelmare]

Looks good!

Please add a breaking change paragraph for the change of the timestamp string for last update state attribute.

[epenet]

Thanks @MartinHjelmare