chore: Add a few missing std::move to shared_ptr.

[Skylion007]

Motivation and Context

• This prevents some unnecessary atomic increments and decrements of a shared pointer. We only ever appear to pass the shared pointer by value anyway so this should be more efficient. The previous version of the code always performed a copy.

How Has This Been Tested

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.