Don't block on global scope during ext startup #2313

Job	Run time
TypeScript Unit Tests (ubuntu-latest)	24s
TypeScript Unit Tests (windows-latest)	46s
Create VSIX	32s
Lint	17s
Smoke Tests	0s
Integration Tests	-1s
Integration Tests (Multi-Root)	-1s
E2E Tests	-1s
	1m 56s

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