Update test suite for pvlib v0.9.0

[kandersolar]

Description

This PR updates the test suite to not use the orientation_strategy ModelChain parameter (removed in v0.9.0). Here is an example failed CI run from #114: https://github.com/pvlib/pvanalytics/runs/4398633530?check_suite_focus=true

At some point we will need to stop using SingleAxisTracker as well, but it still works for now.

Checklist

The following items must be addressed before the code can be merged.
Please don't hesitate to ask for help if you are unsure of how to accomplish any of the items.
You are free to remove any checklist items that do not apply or add additional items that are
not on this list

• Closes #xxx
• Added new API functions to docs/api.rst
• Clearly documented all new API functions with PEP257 and numpydoc compliant docstrings
• Adds description and name entries in the appropriate "what's new" file
  in docs/whatsnew
  for all changes. Includes link to the GitHub Issue with :issue:`num`
  or this Pull Request with :pull:`num`. Includes contributor name
  and/or GitHub username (link with :ghuser:`user`).
• Non-API functions clearly documented with docstrings or comments as necessary
• Added tests to cover all new or modified code
• Pull request is nearly complete and ready for detailed review

[cwhanse]

@kanderso-nrel the "reno" test failures are known #105 and not a blocker here. Can we skip those tests for now?

[kandersolar]

We marked them as expected to fail in #106, so I think a failure here means that the tests are actually passing. I haven't been keeping track of the changes to that function so maybe that's expected. In any case those two tests should be skipped entirely now.

[kandersolar]

Failures are all coveralls, and the coverage changes are all related to clearsky.reno. So I think this is good to go

[wfvining]

In addition to removing the use of SingleAxisTracker at some point we should also use the new PVSystem + Array.

[cwhanse]

In addition to removing the use of SingleAxisTracker at some point we should also use the new PVSystem + Array.

#116

[kandersolar]

Ok, with two approving reviews I'll go ahead and merge. Thanks @cwhanse and @wfvining