feat: add max cached states env var

[agostbiro]

Add __EDR_MAX_CACHED_STATES environment variable to allow changing the default value of 10 to improve performance. Increasing the value causes higher memory usage and may lead to slow downs if the machine runs out of memory and starts swapping.

Repo	Improvement over HH2.20 with cache size = 10 (default)	Improvement over HH2.20 with cache size = 2048	RAM usage with cache size = 2048
openzeppelin-contracts	10%	28%	6GB
rocketpool	51%	60%	6GB
uniswap-v3-core	3.5%	10%	4GB

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Latest commit: c56f1a6

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