BOM Weather throttle fix

[nickw444]

Description:

Some throttling code appears to be duplicated between both the function body BOMCurrentData.update (using this._last_update) as well as by the @Throttle decorator. This PR removes the in-function throttling and extends the duration used by @Throttle to 35 minutes.

Also rename rest to bom_data

This change was suggested by @OttoWinter in #14042 (comment)

Example entry for configuration.yaml (if applicable):

weather:
  - platform: bom
    station: IDN60901.94767
sensor:
  - platform: bom
    station: IDN60901.94767
    name: Sydney
    monitored_conditions:
      - apparent_t
      - cloud
      - cloud_base_m
      - cloud_oktas
      - cloud_type_id
      - cloud_type
      - delta_t
      - gust_kmh
      - gust_kt
      - air_temp
      - dewpt
      - press
      - press_qnh
      - press_msl
      - press_tend
      - rain_trace
      - rel_hum
      - sea_state
      - swell_dir_worded
      - swell_height
      - swell_period
      - vis_km
      - weather
      - wind_dir
      - wind_spd_kmh
      - wind_spd_kt

Checklist:

• The code change is tested and works locally. - Tested using tests in Fix BOM weather '-' value #14042
• Local tests pass with tox. Your PR cannot be merged unless tests pass

[OttoWinter]

Thanks 👍