This update organizes UBL test files for better compatibility with future move formats and improved schema validation. The test files have been moved to a more structured folder within the account_edi_ubl_cii module, streamlining testing and development efforts. This change supports ongoing improvements to the UBL invoice generation process.

This commit rearranges the UBL test files' subfolder to be one level higher, from `export/bis3/be` to `export/bis3/invoice/be`, in preparation for supporting different move formats and for better ignore schema support.

task-4891206