Feature/unity 1206 address obsolete find objects of type

[MattGrayUL]

Summary

Replaces the now-obsolete use of find objects of type with newer implementations

Contributor Tasks

• Create or edit test cases here
• Add a CHANGELOG entry for this change.
• Ensure documentation requirements are met e.g., public API is commented.
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Reviewer Tasks

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• Run all tests associated with the ticket.
• Code reviewed.
• Non-code assets e.g. Unity assets/scenes reviewed.
• Documentation has been reviewed.
• Approve with a comment of any additional tests run or any observations.

Closes JIRA Issue

Closes UNITY-1206

[BryceNewell-UL]

Cannot test every change but have tested several and all seem good.