RFR: 8354469: Keytool exposes the password in plain text when command is piped using | grep

[Weijun Wang]

Allow password hiding even if there is no `System.console`. A manual test is included.

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Commit messages:
 - the fix

Changes: https://git.openjdk.org/jdk/pull/27196/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27196&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354469
  Stats: 278 lines in 3 files changed: 247 ins; 4 del; 27 mod
  Patch: https://git.openjdk.org/jdk/pull/27196.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27196/head:pull/27196

PR: https://git.openjdk.org/jdk/pull/27196