RF: Cleanup Makefile to bring parity with CI, remove tox + nose references#1105

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jacobdr wants to merge 2 commits intonipy:masterfrom

jacobdr:1104-remove-nosetest-references

Commits on May 7, 2022

RF: Align on venv as virtual environment convention. Update makefile test target to re-use same script used in CI to orchestrate testing. Remove refererences to tox and nose
Jacob Roberts
committed
RF: Run linting check over whole source tree, use setup.cfg to configure flake8 (closer aligns to pep8speaks bot behavior)
Jacob Roberts
committed