RFR: 8373449: Parallel: Obsolete deprecated PSChunkLargeArrays

[Albert Mingkun Yang]

Obsolete a deprecated jvm flag. Its default value is `true`.

Test: tier1-3

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Commit messages:
 - pgc-obsolete-array-chunk

Changes: https://git.openjdk.org/jdk/pull/28754/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28754&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8373449
  Stats: 9 lines in 3 files changed: 1 ins; 6 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28754.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28754/head:pull/28754

PR: https://git.openjdk.org/jdk/pull/28754