Puppet::Util is not properly defined before use in tests (possibly elsewhere)

[jstraw]

Describe the Bug

In a MayTheSourceBeWithYou rubocop clean up I attempted to clean Style/ClassAndModuleChildren on this repository, and found that for puppet modules, the rubocop is configured for compact, but if you do class Puppet::Util::IniFile instead of module Puppet:Util\n class IniFile tests fail with a NameError uninitialized constant Puppet::Util::IniFile to which @binford2k suggested I make a ticket because "Maybe raise a ticket for someone to investigate because basically what this means is that this is being loaded before Puppet's fully initialized and that seems potentially problematic too."

Expected Behavior

I expected to have tests run successfully

What I got

pdk (INFO): Using Ruby 2.7.7
pdk (INFO): Using Puppet 7.23.0
[✔] Preparing to run the unit tests.
/opt/puppetlabs/pdk/private/ruby/2.7.7/bin/ruby -I/home/jstraw/.pdk/cache/ruby/2.7.0/gems/rspec-core-3.12.2/lib:/opt/puppetlabs/pdk/share/cache/ruby/2.7.0/gems/rspec-support-3.12.0/lib /home/jstraw/.pdk/cache/ruby/2.7.0/gems/rspec-core-3.12.2/exe/rspec --pattern spec/\{aliases,classes,defines,functions,hosts,integration,plans,tasks,type_aliases,types,unit\}/\*\*/\*_spec.rb --format progress

An error occurred while loading ./spec/unit/puppet/provider/ini_setting/inheritance_spec.rb.
Failure/Error: class Puppet::Util::IniFile::Section

Puppet::Error:
  Could not autoload puppet/type/inherit_ini_setting: Could not autoload puppet/provider/inherit_ini_setting/ini_setting: Could not autoload puppet/type/ini_setting: Could not autoload puppet/provider/ini_setting/ruby: uninitialized constant Puppet::Util::IniFile
# ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'
# ./lib/puppet/util/ini_file.rb:4:in `<top (required)>'
# ./lib/puppet/provider/ini_setting/ruby.rb:3:in `<top (required)>'
# ./lib/puppet/type/ini_setting.rb:6:in `<top (required)>'
# ./spec/fixtures/inherit_ini_setting/lib/puppet/provider/inherit_ini_setting/ini_setting.rb:3:in `<top (required)>'
# ./spec/fixtures/inherit_ini_setting/lib/puppet/type/inherit_ini_setting.rb:1:in `<top (required)>'
# ./spec/unit/puppet/provider/ini_setting/inheritance_spec.rb:9:in `<top (required)>'
# ------------------
# --- Caused by: ---
# NameError:
#   uninitialized constant Puppet::Util::IniFile
#   ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'

An error occurred while loading ./spec/unit/puppet/provider/ini_setting/ruby_spec.rb.
Failure/Error: class Puppet::Util::IniFile::Section

Puppet::Error:
  Could not autoload puppet/provider/ini_setting/ruby: uninitialized constant Puppet::Util::IniFile
# ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'
# ./lib/puppet/util/ini_file.rb:4:in `<top (required)>'
# ./lib/puppet/provider/ini_setting/ruby.rb:3:in `<top (required)>'
# ./spec/unit/puppet/provider/ini_setting/ruby_spec.rb:6:in `<top (required)>'
# ------------------
# --- Caused by: ---
# NameError:
#   uninitialized constant Puppet::Util::IniFile
#   ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'

An error occurred while loading ./spec/unit/puppet/provider/ini_subsetting/ruby_spec.rb.
Failure/Error: class Puppet::Util::IniFile::Section

Puppet::Error:
  Could not autoload puppet/type/ini_subsetting: Could not autoload puppet/provider/ini_subsetting/ruby: uninitialized constant Puppet::Util::IniFile
# ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'
# ./lib/puppet/util/ini_file.rb:4:in `<top (required)>'
# ./lib/puppet/provider/ini_subsetting/ruby.rb:3:in `<top (required)>'
# ./lib/puppet/type/ini_subsetting.rb:5:in `<top (required)>'
# ./spec/unit/puppet/provider/ini_subsetting/ruby_spec.rb:6:in `<top (required)>'
# ------------------
# --- Caused by: ---
# NameError:
#   uninitialized constant Puppet::Util::IniFile
#   ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'

An error occurred while loading ./spec/unit/puppet/util/ini_file_spec.rb.
Failure/Error: class Puppet::Util::IniFile::Section

NameError:
  uninitialized constant Puppet::Util::IniFile
# ./lib/puppet/util/ini_file/section.rb:6:in `<top (required)>'
# ./lib/puppet/util/ini_file.rb:4:in `<top (required)>'
# ./spec/unit/puppet/util/ini_file_spec.rb:5:in `<top (required)>'```


## Steps to Reproduce
Steps to reproduce the behavior:
1. Remove the disable of the rubocop for Style/ClassAndModuleChildren
2. Update the 4 classes in question using either autocorrect or manually (using concise rather then nested)
3. run pdk validate and find that the rubocop is no longer failing
4. run pdk test unit and get the errors above

## Environment
 - PDK 2.7.1
 - (Module on 2.7.0)
 - Debian Testing