Fix EE ChangesAuditor classes path

What does this MR do and why?

Fix path of BaseChangesAuditor and it`s derived classes

• ee/lib/ee/audit/base_changes_auditor.rb -> ee/lib/audit/base_changes_auditor.rb
• ee/lib/ee/audit/compliance_framework_changes_auditor.rb -> ee/lib/audit/compliance_framework_changes_auditor.rb
• ee/lib/ee/audit/group_changes_auditor.rb -> ee/lib/audit/group_changes_auditor.rb
• ee/lib/ee/audit/project_changes_auditor.rb -> ee/lib/audit/project_changes_auditor.rb
• ee/lib/ee/audit/project_ci_cd_setting_changes_auditor.rb -> ee/lib/audit/project_ci_cd_setting_changes_auditor.rb
• ee/lib/ee/audit/project_feature_changes_auditor.rb -> ee/lib/audit/project_feature_changes_auditor.rb
• ee/lib/ee/audit/project_setting_changes_auditor.rb -> ee/lib/audit/project_setting_changes_auditor.rb
• ee/lib/ee/audit/protected_branches_changes_auditor.rb -> ee/lib/audit/protected_branches_changes_auditor.rb

• update related specs
• update usage
• fix rubocop errors
• add attributes_from_auditable_model test in order to make undercoverage happy https://gitlab.com/ali_o_kan/gitlab/-/jobs/3048634493#L217

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Related to #359836 (closed)