GONRG-5809: Add artifacts versions to DF TF inputs
Moved artifacts versions from locals in artifacts_versions.tf file to variables in inputs.tf. Every service has its own variable with default 'latest' value.
Edited release.py script. Now it is replacing variable defaults from 'latest' to appropriate release tag instead of creating artifacts_versions.tf file.
Edited by Volodymyr Pienskoi [EPAM / GCP]