RFR: 8341692: Implement JEP 490: ZGC: Remove the Non-Generational Mode [v2]

[Axel Boldt-Christmas]

> This is the implementation task for `JEP 490: ZGC: Remove the Non-Generational Mode`. See the JEP for details. [JDK-8335850](https://bugs.openjdk.org/browse/JDK-8335850)

Axel Boldt-Christmas has updated the pull request incrementally with six additional commits since the last revision:

 - LargeWindowPaintTest.java fix id typo
 - Fix problem-listed @requires typo
 - Fix @requires !vm.gc.Z, must use vm.gc != "Z"
 - Reorder z_globals options: product > diagnostic product > develop
 - Consistent albite special code style
 - Consistent order between ZArguments and GCArguments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21401/files
  - new: https://git.openjdk.org/jdk/pull/21401/files/e5865bc8..22c243a6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21401&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21401&range=00-01

  Stats: 53 lines in 8 files changed: 21 ins; 23 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/21401.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21401/head:pull/21401

PR: https://git.openjdk.org/jdk/pull/21401