Fix two other closed geometric objects.

[dcbr]

Overview

As per my comment in #3710, there are two other closed geometric objects that require a fix in my opinion.

Details

Ellipse

pyvista.Ellipse(resolution=4).plot()

Before	After

Duplicate endpoints and inconsistent edge lengths; similar fix as in #3710.

CylinderStructured

pyvista.CylinderStructured(theta_resolution=4).plot()

Before	After

Inconsistent number of edges/faces when compared to Cylinder; as this is a StructuredGrid duplicate endpoints are needed in this case I believe (correct me if I'm wrong), so the fix is different than for the Ellipse above.

[codecov]

Codecov Report

Merging #3723 (872fe98) into main (9191366) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #3723   +/-   ##
=======================================
  Coverage   94.04%   94.04%           
=======================================
  Files          83       83           
  Lines       18641    18641           
=======================================
  Hits        17530    17530           
  Misses       1111     1111           

[banesullivan]

Thank you for fixing these and adding the versionchanged note. I'm going to add the "breaking-change" label to the PR so this gets picked up in the release notes