[jdk17u-dev] RFR: 8347302: Mark test tools/jimage/JImageToolTest.java as flagless

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

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Commit messages:
 - Backport e7e8f60c9bedd5622525cc4339300b438eedc9fd

Changes: https://git.openjdk.org/jdk17u-dev/pull/3725/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3725&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347302
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3725.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3725/head:pull/3725

PR: https://git.openjdk.org/jdk17u-dev/pull/3725