refactor(versioning): Separate generic from loose versioning (#13747)

lib/versioning/aws-machine-image/index.ts

lib/versioning/docker/index.ts

lib/versioning/generic.spec.ts

lib/versioning/generic.ts

lib/versioning/git/index.ts

lib/versioning/index.spec.ts

lib/versioning/loose/index.ts

lib/versioning/nuget/index.ts

lib/versioning/regex/index.ts