Python: Allow specifying which properties to use for completion data computation

[alifbe]

In some cases (e.g. when user load grid properties from roff file), grid permeability could have "non-standard" property name. It will be very useful if user can specify which grid property to be used for completion data computation.

Propose: add optional arguments to completion_data method so that user can specify which grid property should be used as PERMX, PERMY, PERMZ and NTG.

completion_data(case_id: int, permx: str|None, permy: str|None, permz: str|None, ntg: str|None)

https://api.resinsight.org/en/next-major-release/api/rips.WellPath.html#rips.WellPath.completion_data

[magnesj]

Related to #13046