[release/1.4.16] core/state: rename Delete/IsDeleted to Suicide/HasSuicided

The delete/remove naming has caused endless confusion in the past.

(cherry picked from commit 90fce8bfa6)

core/vm/instructions.go

@@ -614,7 +614,7 @@ func opSuicide(instr instruction, pc *uint64, env Environment, contract *Contrac
 	balance := env.Db().GetBalance(contract.Address())
 	env.Db().AddBalance(common.BigToAddress(stack.pop()), balance)
 
-	env.Db().Delete(contract.Address())
+	env.Db().Suicide(contract.Address())
 }
 
 // following functions are used by the instruction jump  table