[jdk20u] RFR: 8303440: The "ZonedDateTime.parse" may not accept the "UTC+XX" zone id

Wed Mar 8 10:40:20 UTC 2023

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Hi all,
This pull request contains a backport of commit [cfb0a25a](https://github.com/openjdk/jdk/commit/cfb0a25a4ee1a9cebd88c84fa622c46fe1c89bae) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
The commit being backported was authored by Naoto Sato on 6 Mar 2023 and was reviewed by Iris Clark, Jaikiran Pai, Roger Riggs and Lance Andersen.
Thanks!

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Commit messages:
 - Backport cfb0a25a4ee1a9cebd88c84fa622c46fe1c89bae

Changes: https://git.openjdk.org/jdk20u/pull/14/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=14&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303440
  Stats: 81 lines in 2 files changed: 79 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk20u/pull/14.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u pull/14/head:pull/14

PR: https://git.openjdk.org/jdk20u/pull/14