What does this MR do?

Improves URL validation to cover more edge cases and be more consistent across the codebase:

Move URL validation from ApUtilityService to UtilityService.
Validate URLs in HttpRequestService.
Validate URLs in DownloadService.
Fix URL errors from incorrect validation in validateActor.
Add missing URL validation to validateActor.
Re-use parsed URI in validateActor (micro-optimization).
Use shared URL verification in verifyLinkFields.
Add workarounds for node-fetch crashes (954, 1845)

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