Add SLF4J JDK Platform Logging Integration

[kwin]

This provides a SLF4J implementation for JEP 264 Loggers This closes #11684

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[desruisseaux]

I'm neutral on this one. My preference would be to go the opposite way (drop SLF4J, use platform logging or java.util.logging instead), but I realize that it may be too much work for now.

[cstamas]

Since Maven 3.1 the "go to API" was slf4j (while Plexus logger still existed and exists from Maven2 times). I agree that by cutting off legacy we could really shrink the classpath, but at the same time it would introduce huge compatibility issue.

[gnodet]

The idea of bridging various APIs to a single backend is fine. I think this PR goes into the right direction. Whether we want to change the backend, or the official API is a different story.