Do optimistic state update for Z-Wave multilevel switch entities

[MartinHjelmare]

The problem

This issue is the result of a meeting about current issues that block Home Assistant from becoming Z-Wave certified.

Multilevel switch entities, dimmer etc, need an optimistic state update with the passed value, eg brightness, to avoid toggling back and forth in the GUI. This is a workaround to be less confusing for the user. Add the state update in the service handler in the relevant Z-Wave platforms.

See eg: #47388

What version of Home Assistant Core has the issue?

core-2023.4.0.dev0

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant Core

Integration causing the issue

Z-Wave

Link to integration documentation on our website

https://www.home-assistant.io/integrations/zwave_js/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[home-assistant]

Hey there @home-assistant/z-wave, mind taking a look at this issue as it has been labeled with an integration (zwave_js) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of zwave_js can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign zwave_js Removes the current integration label and assignees on the issue, add the integration domain after the command.

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