[jdk17u-dev] RFR: 8314835: gtest wrappers should be marked as flagless

[SendaoYan]

Hi all,
  This is backport of [JDK-8314835](https://bugs.openjdk.org/browse/JDK-8314835), to make releated tests as flagless.
  The backport is not clean, because the file `test/hotspot/jtreg/gtest/NativeHeapTrimmerGtest.java` has subsequent backport [JDK-8325496](https://bugs.openjdk.org/browse/JDK-8325496)
  Only change the testcases, the risk is low.

Thanks,
-sendao

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Commit messages:
 - Backport 1ea6463fbb95258725ed4a11621ec662859a76e0

Changes: https://git.openjdk.org/jdk17u-dev/pull/2470/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2470&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314835
  Stats: 7 lines in 3 files changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2470.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2470/head:pull/2470

PR: https://git.openjdk.org/jdk17u-dev/pull/2470