Add WS command to help reset custom entity_id

[emontnemery]

Proposed change

Add WS command to help reset custom entity_id

Type of change

• [ ] Dependency upgrade
• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New integration (thank you!)
• [x] 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:
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• Link to developer documentation pull request:
• Link to frontend pull request:

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• [ ] The code change is tested and works locally.
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[arturpragacz]

Should we also update it, if the entity is already in the registry?

[emontnemery]

Unfortunately, the optimization from https://github.com/home-assistant/core/pull/144079 needs to be reverted @bdraco FYI

[bdraco]

Unfortunately, the optimization from https://github.com/home-assistant/core/pull/144079 needs to be reverted

@bdraco FYI

No worries. Not going to make that much difference during run time as it mostly for startup

[codecov[bot]]

:x: We are unable to process any of the uploaded JUnit XML files. Please ensure your files are in the right format.

[emontnemery]

Superseded by https://github.com/home-assistant/core/pull/145504