`CLOrient3D` parameter `n_check` validation

[j-c-c]

The n_check parameter is used in build_clmatrix() to reduce the number of pairs to find common lines between and in estimate_shifts() to reduce memory usage.

There are a couple issues with this parameter that need investigating:

1. The parameter is not currently configurable from any of the subclasses that actually implement a common-lines method.
2. It is not clear that this parameter is needed in build_clmatrix(). If it is, we should validate that the CL algos still work with it.
3. We should validate that there is actually a memory issue when using estimate_shifts().

[garrettwrong]

@j-c-c , is this still an active issue? Thanks

[j-c-c]

@garrettwrong, yes, I will try to address when I work on validating the estimate_shifts method (#995).