Improve mock wasmvm query implementation

[chatton]

Description

closes: #4873

The implementation wasn't as straightforward as I was expecting.

It seems it is not possible to use type constraints as keys to a map, because of this I opted to use the type name and pre-populate the map with all allowed types so it is only possible to register types for the expected values.

I needed to move the mock vm to the same package as the types to be able to actually do this.

I'm not too happy about that, and I think we can actually revert that if we just opt to use a set of string constants instead of types. Open to suggestions!

I also looked into the possibility of using an internal directory, but types aren't importable from types_test from a separate package.

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[charleenfei]

i think this is a good base to start migrating the tests with so we can check that the correct q methods are called, happy for you to merge it in first and then we iterate after as needed!