adding SuffixFinder to PyomoGreyBoxNLP #59

Job	Run time
linux/3.8/bare-env	13s
linux/3.12	19m 24s
lint/style-and-typos	1m 50s
osx/3.10	19m 28s
win/3.9	46m 5s
linux/3.11/conda	22m 23s
linux/3.10/mpi	10m 19s
linux/3.10/cython	22m 33s
win/3.8/pip	34m 43s
process-coverage-${{ matrix.TARGET }}	0s
	2h 56m 58s

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