(bugfix): Prevent unnecessary copies with more std::move and emplace

[Skylion007]

Motivation and Context

• When I was reviewing @jturner65's PR, I noticed a series of strings that were being copied into their std::set. This explicitly moves them when inserting them into the set instead which should prevent an unnecessary copy.

How Has This Been Tested

Locally

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have completed my CLA (see CONTRIBUTING)
• I have added tests to cover my changes.
• All new and existing tests passed.

[jturner65]

Looks good to me. Thanks!