idaholab/moose

Enable Quadratic Elements in XYDelaunayGenerator and Related MGs

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Motivation

libMesh/libmesh#3811 has enabled triangulation using quadratic elements. Need to update related MOOSE MGs to use the new capabilities.

Design

Adding element type selection input parameter to XYDelaunayGenerator and related MGs; and call the related methods in libMesh when applicable.

Impact

Enable quadratic elements meshing capabilities in more MGs.