add: add export_delta_scan_report request support

[ozgen]

What

• Add export_delta_scan_report request support
• Add tests for request generation

Why

• Allow python-gvm clients to use the new export_delta_scan_report GMP command

References

GEA-2070

depending on greenbone/gvmd#3131

Checklist

• I have added tests for the changes

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 4a501e0.

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Scanned Files

None

[github-actions]

Conventional Commits Report

Type	Number
Added	1

🚀 Conventional commits found.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.39%. Comparing base (f886e31) to head (4a501e0).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1380   +/-   ##
=======================================
  Coverage   98.38%   98.39%           
=======================================
  Files         104      104           
  Lines        6817     6839   +22     
  Branches     1235     1239    +4     
=======================================
+ Hits         6707     6729   +22     
  Misses         77       77           
  Partials       33       33           

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