Fix non-deterministic MMC bug on GPU

[moprak-nrel]

Summary

Initialize m_abl_tendency to false, it is currently just set with a pp.query. This leads to a buggy non-deterministic behavior when it is not explicitly set in the input file. This should hopefully fix #1057.

Pull request type

Please check the type of change introduced:

• [x] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

Checklist

The following is included:

• [ ] new unit-test(s)
• [ ] new regression test(s)
• [ ] documentation for new capability

This PR was tested by running:

• the unit tests
  • [x] on GPU
  • [ ] on CPU
• the regression tests
  • [x] on GPU
  • [ ] on CPU

Additional background

Issue Number: #1057

[moprak-nrel]

The offending call is at https://github.com/Exawind/amr-wind/blob/277e7d61e37a7a3c10f6b26b8f9c71832f68dc83/amr-wind/wind_energy/ABLMesoscaleInput.cpp#L67-L68