common: enable ha_time in common packages, devices extend it

Move the homeassistant time platform (id ha_time) into all common
packages. Devices with custom triggers now use '!extend ha_time';
plain duplicate time blocks are removed. mcu-lvgl's unused time_comp
is unified to ha_time.

mcu-fireplace.yaml

@@ -44,11 +44,6 @@ packages:
 # Relay1    G22
 # Relay2    G19
 
-time:
-  - platform: homeassistant
-    id: ha_time
-    timezone: Europe/Bratislava
-
 i2c:
   # - id: i2c0
   #   sda: 26