(rpc_server): cache layer improvement

[kobayurii]

This pull request enhances the cache layer for the rpc_server module, focusing on improving performance and fetching data from fastnear data.

Key changes include:

1. Added Chunks Cache
2. Improved Blocks Cache
3. Enhanced Contract Code Cache

These improvements collectively aim to boost the overall efficiency of the RPC server, particularly for high-demand scenarios.

[khorolets]

@race-of-sloths score 5

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Current status: executed

Reviewer	Score
@khorolets	5

Your contribution is much appreciated with a final score of 5!
You have received 55 (50 base + 10% lifetime bonus) Sloth points for this contribution

@khorolets received 25 Sloth Points for reviewing and scoring this pull request.

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