How to reproduce:
1. Open the “IN-85904_repro“ project
2. Open the Task Manager on your device
3. Press Crtl+K to open Global Search
4. Enter “prefab“ in the search
5. In Task Manager observe the Editor’s memory usage

Expected result: Memory usage does not increase significantly
Actual result: Memory usage increases significantly

Reproducible with: 2021.3.45f1, 6000.0.24f1, 6000.1.0a1
Could not test with: 2022.3.51f1 (asset indexer errors)

Reproducible on: Windows 10, Windows 11
Not reproducible on: No other environment tested

Notes:
- If prefabs are selected and edited (after using search), the memory usage increases further
- Memory leak seems to occur during or after the “Building assets search index“ background process