[jdk21u-dev] RFR: 8366261: Provide utility methods for sun.security.util.Password

[Goetz Lindenmaier]

src/java.base/share/classes/java/io/Console.java
Resolved several chunks
 * import
 * isTerminal() does not exist in 21, omitted.
 * two chunks need to be implemented differently: replace istty() by the two
   new methods.
 * place new methods in file

src/java.base/share/classes/jdk/internal/io/JdkConsoleImpl.java
Resolved because https://bugs.openjdk.org/browse/JDK-8330276: "Console methods with explicit Locale" is not in 21.

src/java.base/unix/native/libjava/Console_md.c
src/java.base/windows/native/libjava/Console_md.c
test/jdk/java/io/Console/ModuleSelectionTest.java
Trivial resolves.

Further I needed adaptions to make it compile, see extra commit.

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Commit messages:
 - replace StableValue
 - make it compile
 - backport b0a520657d980f14b86afe6027dc0ebd34afef8f

Changes: https://git.openjdk.org/jdk21u-dev/pull/2616/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2616&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366261
  Stats: 119 lines in 6 files changed: 95 ins; 0 del; 24 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2616.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2616/head:pull/2616

PR: https://git.openjdk.org/jdk21u-dev/pull/2616