[jdk25u] RFR: 8370646: TestLargeUTF8Length.java needs lots of memory [v2]

[SendaoYan]

> Hi all,
> 
> This pull request contains a backport of commit [3c1010b5](https://github.com/openjdk/jdk/commit/3c1010b57f2f8258a2ccf59b9f86fc8debd71918) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Kelvin Nilsen on 31 Oct 2025 and was reviewed by Paul Hohensee, William Kemper and Y. Srinivas Ramakrishna.
> 
> Thanks!

SendaoYan has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into backport-sendaoYan-3c1010b5-master
 - Backport 3c1010b57f2f8258a2ccf59b9f86fc8debd71918

-------------

Changes:
  - all: https://git.openjdk.org/jdk25u/pull/354/files
  - new: https://git.openjdk.org/jdk25u/pull/354/files/c796143d..3c565ad1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk25u&pr=354&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk25u&pr=354&range=00-01

  Stats: 1056 lines in 50 files changed: 877 ins; 46 del; 133 mod
  Patch: https://git.openjdk.org/jdk25u/pull/354.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/354/head:pull/354

PR: https://git.openjdk.org/jdk25u/pull/354