[backend] Define file marking definitions (#opencti/5797-export)

[Goumies]

Proposed changes

• Update export report pdf by passing markings

Related issues

• Apply marking definition to export files opencti#5797

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

This pull request is related to the ones in the Open-CTI and Connectors :

• [frontend/backend] Apply marking definition to export files (#5797) opencti#6030
• [backend] Define file marking definitions (#opencti/5797-export) connectors#2011