build(blockifier): add l2_gas_price to blockinfo #1562

Job	Run time
codecov	10m 37s
codecov	10m 28s
executable-run	2m 45s
executable-run	2m 45s
executable-run-no-rpc	1m 50s
executable-run-no-rpc	1m 50s
integration-test	2m 57s
integration-test	2m 57s
p2p-sync-e2e-test	2m 39s
p2p-sync-e2e-test	2m 39s
test-no-rpc	54s
test-no-rpc	54s
build-papyrus-utilities-image	8m 13s
build-papyrus-utilities-image	8m 13s
check-starknet_api-dependency	0s
check-starknet_api-dependency	0s
random-table-test	7s
random-table-test	7s
	59m 55s

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