Improve Hfss.create_setup() to parse a frequency list.

[Devin-Crawford]

Description of the current limitations

If a user passes a list of frequencies to the Hfss.create_setup() method the list should be interpreted as a request for multiple frequency adaptive refinement.

Code sample expected

If a list is passed to the keyword Frequency, this should be interpreted as the argument to "MultipleAdaptiveFreqSetup" which will be handled correctly in Hfss.create_setup().

Useful links and references

See this example: https://examples.aedt.docs.pyansys.com/version/dev/examples/high_frequency/antenna/dipole.html