[jdk17u-dev] RFR: 8281682: Redundant .ico files in Windows app-image cause unnecessary bloat

[Goetz Lindenmaier]

I would like to backport this to 17. This is a nice to have fix for jpackage, and it makes later backports more simple. Will also do the test follow-ups.

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Commit messages:
 - backport 45180633d34b6cbb679bae0753d9f422e76d6297

Changes: https://git.openjdk.org/jdk17u-dev/pull/4054/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4054&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8281682
  Stats: 165 lines in 7 files changed: 148 ins; 6 del; 11 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4054.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4054/head:pull/4054

PR: https://git.openjdk.org/jdk17u-dev/pull/4054