chore: use for...of instead of forEach in dtls

[Uzlopak]

No description provided.

[koush]

even I prefer using for loops but i personally dont think restyling the entire code base is appropriate. there is no tangible benefit to this change.

[Uzlopak]

@koush

1. biome is complaining
2. forEach is always slower. For each function call the engine needs to create a scope/context.

I am also active in fastify, nodejs and undici, and we always try to avoid these array helper functions, because they are a performance bottleneck.

[Uzlopak]

CLeaning up my open pr list