Don't name entity to avoid duplicate name

[jamesonuk]

Sorry managed to delete original repo I submitted PR from so this is identical to #1350

Motivation:

Avoid duplicate entity name
Not sue if this is the best way to do it but it resolves #1332

Changes:

I have added _attr_name = None as per https://developers.home-assistant.io/docs/core/entity/#has_entity_name-true-mandatory-for-new-integrations and then just replace the inbuilt name property with a custom device_name property

Related issue (check one):

• fixes Entity has double friendly name #1332
• there is no related issue ticket

Checklist (check one):

• I did not change any code (e.g. documentation changes)
• The code change is tested and works locally.

Test-Hardware list (for code changes)

HA Version: 2024.5.1
Zigbee2MQTT Version: 1.37.1
TRV Hardware: Sonoff TRVZB

New device mappings

• I avoided any changes to other device mappings
• There are no changes in climate.py