Refs: #182270

As discussed with @sandy081, we can try to provide atomic option for writeFile and delete which:

• asks for a Uri to use for the atomic support as a temp file
• writeFile: writes to the temp file and then renames to the target
• delete: renames the target to the temp file and then deletes [1]

We should implement this as file system provider capability but also surface as options on the file service.

[1] we should continue to support the tmp folder as fallback for delete as we do today