Refactor DNS result inspection

[timokoessler]

Remove double stored SSRF check through refactoring

[codecov[bot]]

Codecov Report

:x: Patch coverage is 97.87234% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...rary/vulnerabilities/ssrf/inspectDNSLookupCalls.ts	97.87%	2 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!

[timokoessler]

Reason for the missing lines in Code Coverage is that the redirection protection is still disabled.