Remove extra get_relations ORM queries

[whatisgalen]

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Description of Change

Issues Solved

Closes #11459

Checklist

• I targeted one of these branches:
  • dev/7.6.x (under development): features, bugfixes not covered below
  • dev/7.5.x (main support): regressions, crashing bugs, security issues, major bugs in new features
  • dev/6.2.x (extended support): major security issues, data loss issues
• I added a changelog in arches/releases
• I submitted a PR to arches-docs (if appropriate)
• Unit tests pass locally with my changes
• I added tests that prove my fix is effective or that my feature works
• My test fails on the target branch

Accessibility Checklist

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Ticket Background

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Further comments

[apeters]

Haven't tested this yet, but on first glance this looks like a nice improvement.

[whatisgalen]

Haven't tested this yet, but on first glance this looks like a nice improvement.

Thanks! I think there's potentially a more in-depth improvement beyond these changes that would separate backend logic used by the related-resources manager/search filter from the report's need to get related resources. However that's likely better suited for a PR against dev/8.0.x.

[apeters]

looks good