[Bug][vm] Function types allowed as parameters even if feature is not enabled

[wrwg]

trafficstars

It appears the following code can be published even if function types are not enabled:

    fun transfer_and_create_account(some_f: |u64|u64): u64 {
        some_f(3)
    }

[rahxephon89]

Note that this only happens in the testing environment

[vineethk]

Closing as something that can only happen with the wrong test setup.