Add iterator to shared table #1716

Job	Run time
Lint Extension	10s
Verify and Build Roblox Studio Plugin	4m 3s
Build Server (windows-latest)	4m 23s
Test Extension (macos-latest)	44s
Build Server (ubuntu-20.04)	4m 6s
Test Extension (ubuntu-20.04)	44s
Run Tests (windows-latest)	6m 11s
Build Server (macos-latest)	3m 59s
Run selene	12s
Test Extension (windows-latest)	3m 38s
Run Tests (ubuntu-20.04)	5m 43s
Run stylua	8s
Types Smoketest	4m 11s
	38m 12s

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