Fix CI build errors: replace semver with Pep440Version and fix test i… #2743

Job	Run time
Lint	21s
TypeScript Unit Tests (windows-latest)	1m 1s
TypeScript Unit Tests (ubuntu-latest)	20s
Create VSIX	36s
Smoke Tests	-1s
Integration Tests (Multi-Root)	-1s
E2E Tests	-1s
Integration Tests	-1s
	2m 14s

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