RFR: 8311380: Prepare java.desktop for C++17 [v2]

[Julian Waters]

> Despite the fancy name, all this change does is move a few standard library headers to the top so macro definitions don't break them, remove the register specifiers from allocation methods, and remove dynamic exception specifiers from AWT code

Julian Waters has updated the pull request incrementally with one additional commit since the last revision:

  awt_new.cpp: Do not return nullptr always...

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14795/files
  - new: https://git.openjdk.org/jdk/pull/14795/files/88e899f4..59d8c8bc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14795&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14795&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14795.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14795/head:pull/14795

PR: https://git.openjdk.org/jdk/pull/14795