googleDrive.exportFile export a Google Workspace file to another format.
Example
Inputs
ProvidefileId and the destination mimeType. name is optional. A second argument with account selects a Google Account.
Output
Returns aFile containing the exported bytes. Google limits available formats by source file type and caps exported content at 10 MB. If an export exceeds that limit, try a more compact supported format or split the source into smaller files before retrying.