Fix Nissan leaf climate control (icon + fire & forget)

[filcole]

Proposed change

Add a fan icon to the climate control switch in same style as Renault integration.
Nissan servers do not send a usable climate control on/off response, so fire and forget on/off request instead.

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)
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• Code quality improvements to existing code or addition of tests

Additional information

Don't error on climate control on/off switch change. Add better icon.

• This PR fixes or closes issue: fixes #
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[davet2001]

For fire and forget, do you also need to change the assumed state attribute?

https://www.home-assistant.io/docs/configuration/state_object/

[filcole]

Hi @davet2001, I tried setting assumed_state temporarily and then immediately requesting fresh state from the Nissan servers (takes about 1 minute). During that time the control changes from a switch to two lightning bolts, which I don't think is what we want. Thanks for suggestion - because I will update it to now request and update within the minimum update period (2 mins) after climate change state change.

[filcole]

Replaced by #63029