Get rid of `REQUIRE_NODE_MODULES`

[smoelius]

However, for the long term, I am wondering if we can remove the REQUIRE_NODE_MODULES and simply rely on the presence of the package.json to decide if we should install node packages or not. There should be only rare cases in which the package.json exists and is not required to build or test the project.

Originally posted by @tarunbhm in https://github.com/trailofbits/necessist/issues/580#issuecomment-1630134892