feat: add caching for `get_block` #930

Job	Run time
Test mpt_trie	26s
Test trace_decoder	33s
Test proof_gen	51s
Test evm_arithmetization	8m 46s
Test zero_bin	9m 33s
Rustdoc, Formatting and Clippy	2m 31s
Execute bash script to generate and verify a proof for multiple blocks using parallel proving.	11m 19s
Execute bash script to generate and verify a proof for a small block.	9m 30s
Execute bash script to generate the proof witness for a small block.	1m 50s
Test zk_evm_proc_macro	15s
	45m 34s

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