RFR: 8370156: Fix jpackage IconTest [v2]

[Alexey Semenyuk]

> Rework IconTest.
> 
> Verified it produces the output as expected.

Alexey Semenyuk has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge with the master
 - Merge branch 'master' into JDK-8370156
 - Rollback JDK-8370100 specific patch
 - AdditionalLauncher: make getAdditionalLauncherProperties() public; LauncherIconVerifier: make setters unambiguous; Add ConfigurationTarget
 - IconTest: revamp

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Changes: https://git.openjdk.org/jdk/pull/27883/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27883&range=01
  Stats: 315 lines in 4 files changed: 173 ins; 62 del; 80 mod
  Patch: https://git.openjdk.org/jdk/pull/27883.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27883/head:pull/27883

PR: https://git.openjdk.org/jdk/pull/27883