Improve the transmission integration (#34223)

* Update state after adding a new torrent

* Use cached torrents list in check_started_torrent_info

* Add torrent_info to all sensors

* Add torrent_info for active torrents

* Fix typo

* Update codeowners

* Do not set eta if it's unknown

* Fix codeowners

* Extract TransmissionSpeedSensor

* Extract TransmissionStatusSensor

* Extract TransmissionTorrentsSensor

* Refactor device_state_attributes() and update()

* Remove unused methods

* Use async_on_remove

* Fix sensor update

* Add transmission.remove_torrent service

* Add transmission_removed_torrent event

* Fix naming

* Fix typo in services.yaml