Remove pending tag if there's no renderer instance

[AidanCaruso]

Summary

One liner, title describes all. Remove the scene pending tag if there's no renderer instance. Created to fix capture page hanging on scenes with model components.

References

closes #insert number here

Explanation

🤖 Generated by Copilot at 0e9dbd4

• Fix a bug where some entities would not render properly after loading a scene (link)

🤖 Generated by Copilot at 0e9dbd4

SceneAssetPendingTag
Cut from entity, now free
Scene assets ready

QA Steps

List any additional steps required to QA the changes of this PR, as well as any supplemental images or videos.

Checklist

• If this PR is still a WIP, convert to a draft
• When this PR is ready, mark it as "Ready for review"
• ensure all checks pass
• Changes have been manually QA'd
• Changes reviewed by at least 2 approved reviewers