fix: refactor delays out of slow reliable channel tests

[adklempner]

Problem / Description

Solution

Notes

• Resolves
• Related to

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Checklist

• Code changes are covered by unit tests.
• Code changes are covered by e2e tests, if applicable.
• Dogfooding has been performed, if feasible.
• A test version has been published, if required.
• All CI checks pass successfully.

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku node	96.1 KB (0%)	2 s (0%)	1.9 s (+19.91% 🔺)	3.8 s
Waku Simple Light Node	147.38 KB (0%)	3 s (0%)	1.6 s (-9.7% 🔽)	4.5 s
ECIES encryption	22.51 KB (0%)	451 ms (0%)	395 ms (-33.45% 🔽)	845 ms
Symmetric encryption	21.91 KB (0%)	439 ms (0%)	715 ms (+59.41% 🔺)	1.2 s
DNS discovery	52.15 KB (0%)	1.1 s (0%)	1.1 s (-13.58% 🔽)	2.2 s
Peer Exchange discovery	52.9 KB (0%)	1.1 s (0%)	1.1 s (+38.91% 🔺)	2.2 s
Peer Cache Discovery	46.57 KB (0%)	932 ms (0%)	1.3 s (+83.52% 🔺)	2.2 s
Privacy preserving protocols	77.05 KB (0%)	1.6 s (0%)	1.4 s (-21.66% 🔽)	2.9 s
Waku Filter	79.69 KB (0%)	1.6 s (0%)	1.3 s (+29.22% 🔺)	2.9 s
Waku LightPush	77.77 KB (0%)	1.6 s (0%)	1.6 s (+7.74% 🔺)	3.1 s
History retrieval protocols	83.61 KB (0%)	1.7 s (0%)	1.5 s (+17.64% 🔺)	3.1 s
Deterministic Message Hashing	28.9 KB (0%)	578 ms (0%)	460 ms (-43.38% 🔽)	1.1 s