Optionally report usage of Qt components

As a commercial customer I want to collect data which parts of Qt are used by my developers.

This feature is supposed to be off by default.

What data exactly?

• Qt COMPONENTS (the stuff in find_package maybe)
• host platform
• target platforms
• commercial licensee or not

Users should have a way to review what's sent to us.

We might be using Qt Insights for this. If VS Code ecosystem is offering something, prefer that.