chore: add execProcess wrapper and refactor poetryUtils (Fixes #1239)… #467

Job	Run time
Create VSIX	33s
Lint	17s
TypeScript Unit Tests (windows-latest)	1m 17s
TypeScript Unit Tests (ubuntu-latest)	43s
Smoke Tests (macos-latest, 3.9)	2m 56s
Smoke Tests (windows-latest, 3.9)	3m 48s
Smoke Tests (ubuntu-latest, 3.9)	2m 18s
Smoke Tests (windows-latest, 3.14)	3m 29s
Smoke Tests (ubuntu-latest, 3.14)	2m 29s
Smoke Tests (windows-latest, 3.12)	2m 58s
Smoke Tests (ubuntu-latest, 3.12)	2m 16s
Smoke Tests (macos-latest, 3.14)	2m 44s
Smoke Tests (macos-latest, 3.12)	2m 36s
Integration Tests	-1s
E2E Tests	-1s
	28m 22s

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