fix: failing node_optional check

[danisharora099]

Problem

We store multiaddrs for nodes from the deployed fleets hardcoded. This is unreliable, is our source of truth is the ENR Tree, and resolution of nodes should occur from the ENR Tree.

Solution

Remove the predfined list of nodes, and use the ENR Tree for resolution

Notes

• Resolves chore: remove predefined list of nodes #2035
• fixes the failing node_optional CI check

Contribution checklist:

• covered by unit tests;
• covered by e2e test;
• add ! in title if breaks public API;

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku node	181.63 KB (0%)	3.7 s (0%)	20.7 s (+17.61% 🔺)	24.3 s
Waku Simple Light Node	181.56 KB (0%)	3.7 s (0%)	17 s (+7.52% 🔺)	20.7 s
ECIES encryption	23.12 KB (0%)	463 ms (0%)	4.8 s (+197.32% 🔺)	5.2 s
Symmetric encryption	22.58 KB (0%)	452 ms (0%)	4 s (-7.99% 🔽)	4.4 s
DNS discovery	72.49 KB (0%)	1.5 s (0%)	12.2 s (-18.32% 🔽)	13.6 s
Peer Exchange discovery	74.15 KB (0%)	1.5 s (0%)	16.2 s (+62.96% 🔺)	17.7 s
Local Peer Cache Discovery	67.68 KB (0%)	1.4 s (0%)	16.9 s (+24.29% 🔺)	18.2 s
Privacy preserving protocols	38.87 KB (0%)	778 ms (0%)	8.5 s (-6.25% 🔽)	9.2 s
Waku Filter	111.92 KB (0%)	2.3 s (0%)	17 s (+17.71% 🔺)	19.2 s
Waku LightPush	110.39 KB (0%)	2.3 s (0%)	16.4 s (+16.01% 🔺)	18.6 s
History retrieval protocols	110.91 KB (0%)	2.3 s (0%)	15.1 s (+53.84% 🔺)	17.3 s
Deterministic Message Hashing	7.29 KB (0%)	146 ms (0%)	2.1 s (+88.23% 🔺)	2.3 s