Drop lib/gem-name.rb in favor of lib/gem/name.rb

[jrafanie]

Adopt convention already supported by bundler and required by zeitwerk so we don't need to tell zeitwerk to ignore this lib/gem-name.rb file.

[miq-bot]

Checked commit https://github.com/jrafanie/manageiq-providers-ovirt/commit/823214651a04d14361efd7acf118c85b720def5a with ruby 2.6.10, rubocop 1.28.2, haml-lint 0.35.0, and yamllint 2 files checked, 1 offense detected

lib/manageiq/providers/ovirt.rb

• [ ] :exclamation: - Line 3, Col 1 - Layout/TrailingEmptyLines - 1 trailing blank lines detected.