[jdk11u-dev] RFR: 8320570: NegativeArraySizeException decoding >1G UTF8 bytes with non-ascii characters

[Martin Doerr]

Backport of [JDK-8320570](https://bugs.openjdk.org/browse/JDK-8320570) from JDK 17. Not all parts apply. The included test has passed. Please review!

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Commit messages:
 - Backport fc01ffe952f781f7510575b015c64cfc6b7431ed

Changes: https://git.openjdk.org/jdk11u-dev/pull/2783/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2783&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320570
  Stats: 79 lines in 2 files changed: 76 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2783.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2783/head:pull/2783

PR: https://git.openjdk.org/jdk11u-dev/pull/2783