Fix index: Cloud SDMS does not support write::Truncate mode, so delete...

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?

SDMS does not support file write mode open::Truncate so any existing files have to be explicitly deleted before writing new versions of index files.