Clear entity ID during automation duplication

[spacegaier]

Breaking change

Proposed change

During automation duplication, the entity ID was not reset which meant that for the unsaved new automation, we still internally had the old stateObj during rendering and allowed the user to enable/disable and execute the old base automation.

With this PR we now set the entity ID back to undefined and the UI reacts accordingly.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes Automation Duplicate, clicking enable/disable button before Save alters the original only #7315
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• 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