[translation] add source_document_url to DocumentStatusResult

[kristapratico]

The service has started returning a property called source_path that links back to the source document on DocumentStatusResult. We should expose this in the client library and call it source_document_url

[mshaban-msft]

can't find the source_path on DocumentStatusDetail generated model only the path attr
should i add it manually?!
if so, i thought we aren't supposed to modify the generated code, only run re-generate

[kristapratico]

Ah right, we'll need to wait until the swagger is updated to include source_path and then regenerate on it to get this new field. Let me check on that.

[mshaban-msft]

we need to update the samples once code re-regeneration is done!
this is in order to use source_path instead of translated_document_url in check_documents() function
as current code samples conflate the two!

[kristapratico]

Very true! I'm going to open an issue to update samples.

[kristapratico]

completed in #17719