move osslifecycle and nycrc into /github

As noted in https://github.com/badges/shields/pull/5234 these two anomolies should be moved into the `/github` dir and URL namespace, like all the other "get a file from a github repo and extract a value" badges. We should set up redirects for compatibility.

Start by reviewing pull request 5234 and the existing badges in the /github directory to compare them with osslifecycle and nycrc. Trace how badge URL namespaces and compatibility redirects are configured; done means both badges use the /github location and namespace while their previous URLs redirect correctly.

Written by the indexing model from the issue text.