RMS-8495: Komprise Memory leak

[scribe]

Some work with a profiler detected a handful of issues:

• A whole bunch of inner cases were marked static so the outer class can be GC'd
• Replace Arrays.asList(new String[] {} with Collections.emptyList() to avoid unnecessary allocations
• Replace anonymous new Function<…> with static classes to allow the GC to run correctly
• Replace single item Arrays.asList with List.of which should bound allocation
• Remove tons of unused import statements which allowed removal of a sub-project dependency that wasn't actually used.
• Replace Charset.forName("UTF-8") which requires a parser with StandardCharsets.UTF_8 which does not.

All of these together have left the profiler graphs in significantly better shape.

Edit: I ran tests on my laptop but I really want to see the tests run in Jenkins to give me better feelings.

[scribe]

Looks like I have a merge issue merging with master. Time to clean it up.

[david-limbach]

@scribe Seems like 99% of the changes are converting:
private class
to
private static class

Is this really necessary?

[scribe]

@scribe Seems like 99% of the changes are converting: private class to private static class

Is this really necessary?

If an inner class is not static it needs to be GC'd before the outer class can be marked for GC. What I'm worried about is something we return the lives a long time that keeps the outer class from going away.