RFR: 8330107: Split Awt2dLibraries.gmk into separate AWT and 2D files [v3]

[Magnus Ihse Bursie]

> The file to build most of the java.desktop native libraries, Awt2dLibraries.gmk, is large and unstructured, making it hard to navigate.
> 
> I want to split it into two parts, one for the AWT libraries, and one for the 2D libraries. I also used this opportunity to change the order to be more logical (e.g. grouping "image" libraries and "font" libraries in 2D).

Magnus Ihse Bursie has updated the pull request incrementally with two additional commits since the last revision:

 - Make the split based on the name "awt" instead, and document the reason
 - Rename 2dLibraries.gmk to ClientLibraries.gmk

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18743/files
  - new: https://git.openjdk.org/jdk/pull/18743/files/49f1b4bf..de43e1e0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18743&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18743&range=01-02

  Stats: 905 lines in 4 files changed: 459 ins; 446 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/18743.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18743/head:pull/18743

PR: https://git.openjdk.org/jdk/pull/18743