Update IProductWRTBase unit test with init_ipwrtbasefields.hpp subclass

Here is a summary of the changes:

• Create a tests/init_ipwrtbasefields.hpp subclass to reduce code duplication.
• Consistently add test for seg, quad, tri, hex, prism, pyr, and tet.
• Cuda implementation is compared to StdMat implementation.
• StdMat implementation is compared to Nektar++'s implementation.

assigned to @chanchihin

assigned to @ccantwel and unassigned @chanchihin

changed the description

requested review from @chanchihin

@chanchihin Please consider refactoring your IProductWRTSumFac unit test once this MR is merge. It makes unit testing much easier.

changed the description

added 5 commits

• 2642dbbd...3c5bd1a3 - 4 commits from branch nektar:master
• 353d1ccb - Merge remote-tracking branch 'upstream/master' into updated_iproductwrtbase_unitest

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approved this merge request

mentioned in commit aacecab8

merged