chore: update all references of shard info to RFC terminology

[danisharora099]

This PR changes all references of cluster and index/indexList with the RFC terminologies clusterId and shard/shards

Notes

• reference RFC: https://rfc.vac.dev/spec/66/
• dependent on chore: fix encoder/decoder creation #1742

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku core	78.38 KB (0%)	1.6 s (0%)	1.5 s (-30.55% 🔽)	3.1 s
Waku Simple Light Node	240.9 KB (0%)	4.9 s (0%)	3.9 s (+24.85% 🔺)	8.8 s
ECIES encryption	72.85 KB (0%)	1.5 s (0%)	1.3 s (-3.45% 🔽)	2.8 s
Symmetric encryption	72.83 KB (0%)	1.5 s (0%)	1.2 s (-51.83% 🔽)	2.6 s
DNS discovery	120.85 KB (0%)	2.5 s (0%)	2.8 s (+10.62% 🔺)	5.2 s
Privacy preserving protocols	125.75 KB (0%)	2.6 s (0%)	1.4 s (-56.79% 🔽)	3.9 s
Light protocols	75.95 KB (0%)	1.6 s (0%)	1.6 s (+29.17% 🔺)	3.1 s
History retrieval protocols	74.86 KB (0%)	1.5 s (0%)	1.6 s (-11.88% 🔽)	3.1 s
Deterministic Message Hashing	5.65 KB (0%)	113 ms (0%)	297 ms (-3.64% 🔽)	410 ms

[weboko]

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