Added resolve_state to template distance function

[mnigbur]

Description:

_resolve_state was already used in the "closest" function, to allow for states and entity ids.
Added tests for the "new" functionality.

Related issue (if applicable): fixes #17178

Example template:

{{ distance('device_tracker.anne_therese', 'device_tracker.paulus') }}

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• [x ] New dependencies are only imported inside functions that use them (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

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

[balloob]

Awesome!