fix(x/auth): facultative vesting as well in simulation (backport #22721) (#22726)

Co-authored-by: Julien Robert <julien@rbrt.fr>

x/auth/simulation/genesis.go

@@ -26,6 +26,13 @@ func RandomGenesisAccounts(simState *module.SimulationState) types.GenesisAccoun
 	for i, acc := range simState.Accounts {
 		bacc := types.NewBaseAccountWithAddress(acc.Address)
 
+		// check if vesting module is enabled
+		// if not, just use base account
+		if _, ok := simState.GenState["vesting"]; !ok {
+			genesisAccs[i] = bacc
+			continue
+		}
+
 		// Only consider making a vesting account once the initial bonded validator
 		// set is exhausted due to needing to track DelegatedVesting.
 		if !(int64(i) > simState.NumBonded && simState.Rand.Intn(100) < 50) {