Remove unused object storage config from Terraform::State

What does this MR do?

As of !43665 (merged) Terraform state file data has been moved to the terraform_state_versions table, which allows us to remove the old & unused logic that used to store files against the state itself.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Related to #235108 (closed)