RFR: 8354469: Keytool exposes the password in plain text when command is piped using | grep [v2]

[Weijun Wang]

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

Weijun Wang has updated the pull request incrementally with one additional commit since the last revision:

  decouple PassFailJFrame.java change; simplify code flow

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/27196/files
  - new: https://git.openjdk.org/jdk/pull/27196/files/9272e28f..3a5f9687

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27196&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27196&range=00-01

  Stats: 32 lines in 3 files changed: 0 ins; 27 del; 5 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