revert: undo env.ts refactoring from c6b81080b #4121

Job	Run time
build-and-check	2m 54s
test-integration-cli	44s
test-integration-backend	48s
test-integration-.agents	41s
test-integration-web	44s
test-.agents	48s
test-backend	50s
test-integration-npm-app	47s
test-web	47s
test-npm-app	45s
test-common	45s
test-integration-common	41s
test-integration-packages/agent-runtime	50s
test-cli	51s
test-packages/agent-runtime	51s
	13m 46s

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