RFR: 8347289: HKDF delayed provider selection failed with non-extractable PRK

[Weijun Wang]

A non-exatractable PRK in HKDF Expand-Only is an invalid input, not an internal error.

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Commit messages:
 - the fix

Changes: https://git.openjdk.org/jdk/pull/22976/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22976&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347289
  Stats: 108 lines in 2 files changed: 104 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/22976.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22976/head:pull/22976

PR: https://git.openjdk.org/jdk/pull/22976