feat: alternative (slow) pedersen hash impl optimized for size #678

Job	Run time
Build C++ integration example	1m 0s
Build starknet-curve features	51s
Build starknet-crypto features	1m 7s
Build starknet-core features	1m 38s
Build starknet-providers features	1m 46s
Build starknet-signers features	1m 26s
Build starknet-accounts features	1m 26s
Build starknet-contract features	1m 25s
Build starknet-macros features	1m 1s
Build starknet features	2m 13s
	13m 53s

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