Remove file locking

What does this MR do?

Remove file locking

Why was this MR needed?

In #5416 (closed) we decided to remove file locking until we find a proper solution how to do process locking.

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Added tests for this feature/bug
• In case of conflicts with master - branch was rebased

What are the relevant issue numbers?

Closes #5416 (closed)