[jdk18u] RFR: 8282887: Potential memory leak in sun.util.locale.provider.HostLocaleProviderAdapterImpl.getNumberPattern() on Windows

[Zhengyu Gu]

A clean and low risk backport to fix a memory leak.

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Commit messages:
 - Backport 2cddf3f5391518ea40796e6c4759047d51b7b312

Changes: https://git.openjdk.java.net/jdk18u/pull/86/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=86&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282887
  Stats: 8 lines in 1 file changed: 2 ins; 3 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/86.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/86/head:pull/86

PR: https://git.openjdk.java.net/jdk18u/pull/86