Implement File -> Export File

[cyclops1982]

Export a file as a different type.

Input values:

• FileId (Text - the file id of the tags you want to get)
• FileType (Text - mimeType, as defined here: https://developers.google.com/drive/api/v3/ref-export-formats (last column))

Output values:

• Information from GetInfoById
• The file (File type in K2, XML)

Input validation:
If the fileid is not found, then then provide the following error message: "File '{Id}' not found."
If the export is not supported (for example you try to export a JPEG as plain text) then the following error must be provided: "Cannot convert file type '{Current File type}' of file '{Id}' to '{FileType provided as input}'"

Other info:
API can be found here: https://developers.google.com/drive/api/v3/reference/files/export