import export simulation test for x/wasm is missing

[dadamu]

Currently, x/wasm is not added to store prefix list should be checked inside TestAppImportExport. Is any reasons not to add the check for x/wasm?
https://github.com/CosmWasm/wasmd/blob/main/app/sim_test.go#L158

By the way, the simulation test happens error as follows since the random genesis state does not generate proper LastInstanceID.
https://github.com/CosmWasm/wasmd/blob/main/x/wasm/simulation/genesis.go#L17

The error would be like:

compared 2 different key/value pairs between KVStoreKey{0xc001218320, wasm} and KVStoreKey{0xc000302450, wasm}
    sim_test.go:275: 
                Error Trace:    /home/kilem/forbole-dev/desmos/app/sim_test.go:275
                Error:          Not equal: 
                                expected: 2
                                actual  : 0
                Test:           TestAppImportExport
                Messages:       store A  => 
                            
                                store B lastContractId => 
                                store A  => 
                                store B  =>

May I take care of this issue if the thing I proposed is worth to you?

[alpe]

Thanks for reporting! Good 👁️ .
There is no reason to exclude the wasm module from the test. The CircleCI sim run should have caught this but did not.