[jdk21u-dev] RFR: 8321131: Console read line with zero out should zero out underlying buffer in JLine

[Goetz Lindenmaier]

A fix we should have in 21.
I had to resolve one place due to context, it will probably be recognized as clean.

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Commit messages:
 - Backport bd04f91e9103ee04f643f8d04553705c4d78fda3

Changes: https://git.openjdk.org/jdk21u-dev/pull/33/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=33&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321131
  Stats: 19 lines in 3 files changed: 16 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/33.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/33/head:pull/33

PR: https://git.openjdk.org/jdk21u-dev/pull/33