[jdk17u-dev] RFR: 8325908: Finish removal of IntlTest and CollatorTest

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle.

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Commit messages:
 - Backport 4c7b313e0dc917cdaffbb2ecc86d1347683acad0

Changes: https://git.openjdk.org/jdk17u-dev/pull/3229/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3229&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325908
  Stats: 93 lines in 7 files changed: 46 ins; 20 del; 27 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3229.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3229/head:pull/3229

PR: https://git.openjdk.org/jdk17u-dev/pull/3229