Unifying transaction processing

[OlivierBBB]

• allow for empty byte code in the ROM with appropriate flag
• remove TX_SKIP processing phase
• remove special scenarios for EOA calls / empty init code CREATE's, instead have them use the same pathway as SMC calls and nonempty initcode CREATE's

The appropriate way to deal with this is to

1. teach the ROM how to deal with empty byte code
2. teach the ROM_LEX the same thing
3. then incrementally get rid of
   • TX_SKIP
   • EOA calls
   • empty init code CREATE(2)'s