licenses: go-licenses dropping some libraries

The most recent licenses PR (#15569) dropped a few libraries that are still in use. When I run go-licenses locally, those libraries are maintained, but a few different ones (github.com/akutz/memconn, github.com/alexbrainman/sspi, and some others) are dropped.

We've run into this before, and they are often readded in later runs of go-licenses. My best guess it that intermittent network issues are causing go-licenses to fail to fetch data about those packages and they're getting dropped? Whether it's that or something else, the observed behavior suggests that it will require changes in go-licenses. But I'm opening this issue to track its impact on our license generation.