Add Ferroli EGEA heat pump water heater device config (#4881)
* Add Ferroli EGEA LT heat pump water heater config
* Rename config file
* Update name casing
* Remove default setting for eco work mode
* Remove custom Air Temperature sensor name
* feat (ferroli_egea_waterheater): naming tweaks
- shorten device name: this is prepended some places in the UI, so long names can cause the entity part of the name to get cut off.
- Follow HA naming convention (only first word capitalised)
PR #4881
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>