RFR: 8150564: Migrate useful ExtendedRobot methods into awt.Robot [v23]

[Alisen Chung]

> Some useful methods in ExtendedRobot should be migrated into Robot itself so that ExtendedRobot can be removed in the future. The tests using ExtendedRobot for these migrated methods are changed to use only Robot (removing unnecessary building of ExtendedRobot).

Alisen Chung has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 32 commits:

 - update robot specs
 - Merge branch 'master' of https://github.com/openjdk/jdk into 8150564
 - remove ER from remaining modal test
 - remove /lib/client/ from tests with ER removed
 - update tests, remove extended robot from some tests
 - update tests
 - synchronized for type(char)
 - migrate type(char) method
 - Merge branch 'master' of https://github.com/openjdk/jdk into 8150564
 - remove specified numbers in constant fields, add exception to documentation in glide
 - ... and 22 more: https://git.openjdk.org/jdk/compare/3bcbcc57...c02d4183

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Changes: https://git.openjdk.org/jdk/pull/22044/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22044&range=22
  Stats: 1046 lines in 244 files changed: 234 ins; 447 del; 365 mod
  Patch: https://git.openjdk.org/jdk/pull/22044.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22044/head:pull/22044

PR: https://git.openjdk.org/jdk/pull/22044