Remove cells filter alters input dataset

Describe the bug, what’s wrong, and what you expect:

The remove_cells filter seems to be removing cells inplace on the source mesh and returning a new mesh with the cells removed as well. This is very unexpected – the source mesh should be left unnafected!

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To Reproduce

I uncovered this when doing https://github.com/pyvista/pyvista/discussions/1815#discussioncomment-1703846

from pyvista import examples

truth = examples.load_hexbeam()
source = truth.copy()
out = source.remove_cells([0])

p = pv.Plotter(notebook=0, shape=(1,2))
p.add_mesh(truth.extract_all_edges(), color='k', line_width=10)
p.add_mesh(source, color='tan')
p.subplot(0,1)
p.add_mesh(truth.extract_all_edges(), color='k', line_width=10)
p.add_mesh(out, color='tan')
p.link_views()
p.show()

[banesullivan]

From my perspective, the current default value of inplace=True for this filter is a bug.

[banesullivan]

This was resolved by #1860