[jdk22] RFR: 8322971: KEM.getInstance() should check if a 3rd-party security provider is signed

[Weijun Wang]

8322971: KEM.getInstance() should check if a 3rd-party security provider is signed

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Commit messages:
 - Backport 9fd855ed477bb0849ce5c774854844deec0f4c6b

Changes: https://git.openjdk.org/jdk22/pull/61/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk22&pr=61&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322971
  Stats: 119 lines in 4 files changed: 74 ins; 29 del; 16 mod
  Patch: https://git.openjdk.org/jdk22/pull/61.diff
  Fetch: git fetch https://git.openjdk.org/jdk22.git pull/61/head:pull/61

PR: https://git.openjdk.org/jdk22/pull/61