refactor: 17991 Remove `MerkleNode` interface from `MerkeNodeState` #30410

Job	Run time
Code / Compiles	3m 14s
Dependency (Module Info) / Check	3m 7s
Spotless / Check	3m 16s
HAPI Tests (Node Death Reconnect) / Standard	2m 31s
HAPI Tests (Restart) / Standard	2m 39s
HAPI Tests (Token) / Standard	2m 42s
Unit Tests / Standard	9m 41s
HAPI Tests (Misc) / Standard	3m 56s
HAPI Tests (Crypto) / Standard	2m 46s
HAPI Tests (Smart Contract) / Standard	3m 2s
HAPI Tests (Time Consuming) / Standard	2m 51s
Hedera Node JRS Panel / Abbrev Update Test	52m 26s
Snyk Scan / Standard	3m 42s
JRS Panel / Platform SDK	24m 22s
Gradle Determinism / Generate Baseline	6m 37s
Docker Determinism / Generate Baseline	10m 19s
Gradle Determinism / Verify Artifacts (ubuntu-22.04)	9m 34s
Gradle Determinism / Verify Artifacts (ubuntu-20.04)	9m 17s
Gradle Determinism / Verify Artifacts (windows-2022)	13m 40s
Gradle Determinism / Verify Artifacts (windows-2019)	14m 19s
Gradle Determinism / Verify Artifacts (hiero-network-node-linux-medium)	11m 39s
Gradle Determinism / Verify Artifacts (hiero-network-node-linux-large)	8m 39s
Docker Determinism / Verify Artifacts (hiero-network-node-linux-medium)	4m 58s
Docker Determinism / Verify Artifacts (hiero-network-node-linux-large)	4m 39s
	3h 33m 56s

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