Weld can generate incorrect proxy names for hierarchical interface structures

With JDK 11 and JPMS we need to make sure we create proxies with sensible names that fall into existing modules.

However, in case of a hierarchical interface structure where interface A is in package foo.bar and interface B extends A is in foo.quax, it may currently happen that we generate a proxy starting with foo.quax.A$B$.. meaning the package name and the first class name are a mismatch.

We need to alter the naming algorithm to prevent this.

A reproducer can be seen on my branch along with a WIP fix.