[Bug]: Sims with flag `SigverifyTx` disabled fail with error

[alpe]

Is there an existing issue for this?

• I have searched the existing issues

What happened?

Follow up on #20490 (comment)
Reported by @ggrieco-tob

Some Msg fail with unrecognized public key type in https://github.com/cosmos/cosmos-sdk/blob/main/x/auth/ante/sigverify.go#L529 . The pubkey is nil in the signature passed to the method.
Due to the flag, https://github.com/cosmos/cosmos-sdk/blob/main/x/auth/ante/sigverify.go#L378-L379 is not storing the pubKey on the account and neither https://github.com/cosmos/cosmos-sdk/blob/main/x/auth/ante/sigverify.go#L284 applied

Cosmos SDK Version

main

How to reproduce?

cd simapp; go test --run=TestFullAppSimulation . -Enabled=true -Commit=true -SigverifyTx=false