Introduce a ModuleOpenBuildItem to let extensions control --add-opens needs for the runtime

[Sanne]

Description

Introduce an ModuleOpenBuildItem build item to let extensions control the need to have "--add-opens" instructions to be applied to the runtime.

This needs to influence consistently:

• dev-mode
• production modes (fast jar and uber-jar formats)
• integration tests (Maven, Gradle, IDEA launchers)

And ideally while not needing any action from the user.

Implementation ideas

See #51041