Remove envShellEvent proposal usage #7823

Job	Run time
Create VSIX	2m 39s
Check Python types	2m 2s
Coverage (ubuntu-latest)	9m 29s
Lint	2m 40s
Tests (ubuntu-latest, 3.x, ts-unit)	2m 49s
Tests (ubuntu-latest, 3.x, python-unit)	2m 27s
Tests (ubuntu-latest, 3.x, venv)	3m 6s
Tests (ubuntu-latest, 3.x, single-workspace)	3m 42s
Tests (ubuntu-latest, 3.x, debugger)	2m 16s
Tests (ubuntu-latest, 3.x, functional)	2m 48s
Tests (windows-latest, 3.x, ts-unit)	8m 51s
Tests (windows-latest, 3.x, python-unit)	5m 36s
Tests (windows-latest, 3.x, venv)	7m 21s
Tests (windows-latest, 3.x, single-workspace)	7m 46s
Tests (windows-latest, 3.x, debugger)	8m 18s
Tests (windows-latest, 3.x, functional)	4m 21s
Smoke tests (ubuntu-latest)	3m 5s
Smoke tests (windows-latest)	9m 48s
	1h 29m 4s

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