[Windows] Upgrade to WiX 5.0

[tristanlabelle]

WiX 4.0 is going out of support. The project should upgrade to WiX 5.0.

As part of the upgrade, we can take advantage of at least the following new features:

• Migrate to naked files to avoid superfluous <Component>’s for each <File>
• Migrate to <Files>-based harvesting instead of using Heat