VED-807 Refactor backend #430

Job	Run time
deploy-pr-backend / terraform-plan	47s
deploy-pr-backend / terraform-apply	3m 33s
run-e2e-tests (internal-dev) / wait-for-deployment	5s
run-e2e-tests (internal-dev-sandbox) / wait-for-deployment	2m 41s
run-e2e-tests (internal-dev) / e2e-tests	5m 45s
run-e2e-tests (internal-dev-sandbox) / e2e-tests	21s
run-e2e-tests (internal-dev-sandbox) / batch-e2e-tests	0s
run-e2e-tests (internal-dev) / batch-e2e-tests	1m 31s
	14m 43s

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