[windows] upgrade Wix to 5.0.2

[charles-zablit]

This patch updates the Wix version to 5.0.2 from 4.0.6. The movitation for this update is the introduction of Files which allows to generate components for all the files in a directory instead of having to list them manually.

[charles-zablit]

@swift-ci please smoke test

[compnerd]

no, we don't want to move to 5.x yet. This is something that is a MUCH larger and riskier change.

[charles-zablit]

no, we don't want to move to 5.x yet. This is something that is a MUCH larger and riskier change.

What are the main concerns here? From the Wix docs:

WiX v5 is highly compatible with WiX v4.

Without Wix v5, we have to add ~50 entries manually for all the pip files in swiftlang/swift-installer-scripts#447.

[compnerd]

Ultimately, this is something that I am responsible for, and I don't think that this change is reasonable on its own. when this is done, we should re-author the entire installer manifest set and go through it with sufficient amount of testing for the major upgrade. We have in the past contracted this through FireGiant, and I think that this change should do the same. I think it is better to add the additional rules for the PIP bits for now.