[R4R]: add Euler Hardfork, including BEP-127 and BEP-131#15

Merged

gothery001 merged 2 commits intonode-real:hardfork_eulerfrom gothery001:hardfork_euler

Apr 29, 2022

+1,048-102

Commits on Apr 29, 2022

feat: add BEP-127 and BEP-131 hardfork bytecode to upgrade
goth
committed
feat: force check that Euler height cannot be a multiple of 200, fix getCurrentValidators, raise SystemTxsGas after Euler fork
goth
committed