Fix sensor type creation with multiple Ambient weather stations

[bachya]

Description:

The ambient_pws integration had a bug where, despite supporting multiple weather stations, the same sensor types would be created for every station – even if different stations had different sensor types attached to them. This PR fixes that.

Related issue (if applicable): fixes #30513

Pull request with documentation for home-assistant.io (if applicable): N/A

Example entry for configuration.yaml (if applicable):

ambient_station:
  api_key: !secret ambient_api_key
  app_key: !secret ambient_app_key

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist

[balloob]

Ok to fix this now. We should move to drop monitored conditions as per adr 003

[bachya]

@balloob Even though I use the monitored_conditions nomenclature, it's not doing the same thing that ADR 003 is designed to address: I only create sensors for data that is represented in the API call; I don't allow people to specify what sensors they want to ignore via YAML.

[balloob]

Ok!