Support HEOS devices not logged in to HEOS account

[andrewsayre]

Description:

Adds support for connecting to HEOS devices that are not logged in to the user's HEOS account. All control features are still available, with the exception of loading favorites into source selection. A warning message is printed in the log upon startup when the device is not logged in. Prior to this change, the HEOS config entry would fail to load.

This PR also fixes a data-type issue in async_set_volume_level that resulted in a failure to set the volume level to 0.

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.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[codecov]

Codecov Report

Merging #22913 into dev will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##              dev   #22913   +/-   ##
=======================================
  Coverage   93.83%   93.83%           
=======================================
  Files         448      448           
  Lines       36578    36578           
=======================================
  Hits        34324    34324           
  Misses       2254     2254

Impacted Files	Coverage Δ
homeassistant/components/heos/media_player.py	100% <100%> (ø)	⬆️

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[MartinHjelmare]

We could still gather this and controller.get_input_sources, right?

[andrewsayre]

We could, but it doesn't materially improve performance as there's still only 1 underlying telnet connection to the controller and these commands respond instantaneously. I kept it separate to increase readability of the flow, but can gather it back up if desired.

[MartinHjelmare]

Ok, it's fine. I'll always comment on awaiting in "loops", since sometimes it does make a difference.