RFR: 8295806: TableViewSkin: memory leak when changing skin

[Andy Goryachev]

as determined by SkinMemoryLeakTest (remove line 179) and a leak tester
https://github.com/andy-goryachev-oracle/Test/blob/main/src/goryachev/apps/LeakTest.java

caused by:
- adding and not removing listeners
- adding and not removing event handlers/filters

NOTE:
this fix requires [JDK-8294809](https://bugs.openjdk.org/browse/JDK-8294809) ListenerHelper

-------------

Commit messages:
 - Merge remote-tracking branch 'origin/master' into
 - 8295806: placeholder
 - 8295806: plugged the leak
 - Merge remote-tracking branch 'origin/8294809.listener.helper' into 8295806.table.view.skin
 - 8294809: map change listener
 - Merge remote-tracking branch 'origin/master' into 8294809.listener.helper
 - Merge remote-tracking branch 'origin/master' into 8295806.table.view.skin
 - 8294809: generics
 - 8294809: is alive
 - Revert "8294809: removed weak listeners support"
 - ... and 15 more: https://git.openjdk.org/jfx/compare/3376228a...85f263af

Changes: https://git.openjdk.org/jfx/pull/929/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=929&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295806
  Stats: 209 lines in 7 files changed: 94 ins; 67 del; 48 mod
  Patch: https://git.openjdk.org/jfx/pull/929.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/929/head:pull/929

PR: https://git.openjdk.org/jfx/pull/929