Add support of multi space transactions

Type of change

• Bug Fix
• Feature

Does this introduce a change in the core logic?

• [Yes]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• Azure
• GCP
• IBM

Updates description?

The main purpose of this MR is to add supporting of multi space transactions according to ETP specification.
Previously, only one space per transaction was allowed.

• Add support of multi space ETP transactions
• Add restrictions for create and delete dataspaces based on the dataspaceUris list specified in the StartTransaction
• Fix delete dataspace inside the transaction (vacuum DB can't be performed inside the transaction)
• Fix cleanup of DB-schemas after tests completion

Issue: #62 (closed)