VED-807 Refactor backend #357

Job	Run time
deploy-pr-backend / terraform-plan	45s
deploy-pr-backend / terraform-apply	2m 41s
run-e2e-tests (internal-dev) / wait-for-deployment	35s
run-e2e-tests (internal-dev-sandbox) / wait-for-deployment	4m 10s
run-e2e-tests (internal-dev) / e2e-tests	6m 36s
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 11s
	16m 19s

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