Add option to MSI package to remove previous versions

#### Feature

First off, thanks to all who work on this great product. I'm sorry to whinge.

I just installed wasmtime 6.0.1, and noticed in the Control Panel that 6.0.0 was still on my machine. I know that some people like to have multiple versions of wasmtime on their machine for regression testing or other reasons, but I'd like to see an option in MSI to remove previous versions.

#### Benefit

This feature would reduce clutter on one's drive.

#### Implementation

All this would entail is adding the option when packaging the app in MSI Package Builder.

#### Alternatives

The alternative is to keep doing what I do, i.e., manually remove the older package via Control Panel. It's an unnecessary hassle.