Do not create restart button for sleeping gen2+ Shelly devices

[bieniu]

Breaking change

Proposed change

After merge #154673, the restart button is created for sleeping gen2+ devices, which is incorrect. These devices sleep almost all the time, so using the restart button is practically impossible.
This PR:

• removes existing restart buttons for sleeping gen2 devices
• adds a condition so that this entity is not recreated for sleeping devices

I don't think this change is a breaking change because it was practically impossible to use incorrectly created entities. If I'm wrong, please let me know and I'll add a description in the breaking change section.

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:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• 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
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

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.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

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

[home-assistant]

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

Code owner commands

Code owners of shelly can trigger bot actions by commenting:

• @home-assistant close Closes the pull request.
• @home-assistant rename Awesome new title Renames the pull request.
• @home-assistant reopen Reopen the pull request.
• @home-assistant unassign shelly Removes the current integration label and assignees on the pull request, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the pull request.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the pull request.

[Copilot]

Pull request overview

This PR fixes a bug introduced in #154673 where the restart button was incorrectly created for sleeping gen2+ Shelly devices. Since these devices sleep most of the time, the restart button is practically unusable and should not be created.

Key changes:

• Added a supported condition to the restart button descriptor that prevents creation for devices with sleep_period > 0
• Implemented cleanup logic to remove existing incorrect restart buttons from sleeping gen2+ devices
• Added comprehensive test coverage for the removal functionality

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
homeassistant/components/shelly/button.py	Added supported lambda to restart button descriptor checking sleep_period == 0, implemented cleanup logic to remove existing restart buttons for sleeping RPC devices, refactored to use entry_sleep_period variable for better readability
tests/components/shelly/test_button.py	Added test case test_rpc_remove_restart_button_for_sleeping_devices to verify restart button is properly removed for sleeping devices during setup