[sentinel-intel] Fix (MD5/SHA-1 support & Fix with file metadata)

[romain-filigran]

Proposed changes

• Publish MD5 & SHA-1 in addition to SHA-256
• Stop publishing invalid file metadata
• Fix deletion problems

Related issues

• [sentinel-intel]: Incorrect File indicator metadata sent to Azure Sentinel resulting in incorrect STIX Pattern #3424
• [sentinel-intel]: The connector does not send MD5 and SHA-1-based indicators to Sentinel SIEM #3423

The deletion of indicators has also been corrected. This could solve these two problems:

• [Sentinel-intel] Bad management of updates and non-deletion #3289
• Stream-Sentinel-Intel Connector Not Deleting Indicators from Defender #3177

Checklist

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

[helene-nguyen]

@romain-filigran Following our discussion, I've added a label to not merge until you finished, feel free to ping us when it's done :)

[Powlinett]

Seems to work as intended 👍

The issue is clear now and the fix is accurate, although the code could benefit from a little refacto to help with maintainability (see suggestions in comments) 🙌

Thanks!

[romain-filigran]

@Powlinett : Thank you for your review and comments.

Requested changes applied