REFAC: rename parameters interpolate_... with interpolation_....

Rename the parameters interpolate_{method, dim, ...?} with interpolation_... for a clean english.

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created merge request !120 (merged) to address this issue

mentioned in merge request !120 (merged)

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assigned to @leufen1

mentioned in merge request !125 (merged)

closed via merge request !125 (merged)

mentioned in commit 7f0b5ac2