[jdk21u-dev] RFR: 8307824: Clean up Finalizable.java and finalize terminology in vmTestbase/nsk/share

[Goetz Lindenmaier]

I backport this to keep the 21 u tests up to date.

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

Commit messages:
 - Backport 244f6ac222fa98fba4fb99bf5bccd36e3e6c5de1

Changes: https://git.openjdk.org/jdk21u-dev/pull/1753/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1753&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307824
  Stats: 314 lines in 10 files changed: 24 ins; 271 del; 19 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1753.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1753/head:pull/1753

PR: https://git.openjdk.org/jdk21u-dev/pull/1753