Add gc_each_object for walking the heap

[peterzhu2118]

No description provided.

[launchable-app]

Launchable Report

❌ Test session #2666932 failed 
_{🔔 no issues ✖️3 tests failed ✔️49648 tests passed}

❌ Test session #2666944 failed 
_{🔔 no issues ✖️1 test failed ✔️23808 tests passed}

❌ Test session #2666970 failed 
_{🔔 no issues ✖️1 test failed ✔️24827 tests passed}

Passed test sessions

✅ Test session #2666926 passed 
✅ Test session #2666931 passed 
✅ Test session #2666934 passed 
✅ Test session #2666935 passed 
✅ Test session #2666964 passed 

Build: refs_pull_10135_merge_fdcbf5431fa9f56edba3289fb507fc2f9cd087e8