RFR: 8368692: Restrict Password::readPassword from reading from System.in

[Weijun Wang]

A new security/system property added to determine whether Java can read password from `System.in` if a console is not available.

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Commit messages:
 - the change

Changes: https://git.openjdk.org/jdk/pull/29490/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29490&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368692
  Stats: 100 lines in 3 files changed: 100 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/29490.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29490/head:pull/29490

PR: https://git.openjdk.org/jdk/pull/29490