[jdk17u-dev] RFR: 8365834: Mark java/net/httpclient/ManyRequests.java as intermittent

[SendaoYan]

Hi all,

This pull request contains a backport of commit [09aad0ae](https://github.com/openjdk/jdk/commit/09aad0aea8b9f9fda14c5b18ae67b30ffce817d9) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by SendaoYan on 23 Aug 2025 and was reviewed by Jaikiran Pai.

Thanks!

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Commit messages:
 - Backport 09aad0aea8b9f9fda14c5b18ae67b30ffce817d9

Changes: https://git.openjdk.org/jdk17u-dev/pull/3871/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3871&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365834
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3871.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3871/head:pull/3871

PR: https://git.openjdk.org/jdk17u-dev/pull/3871