RFR: 8303607: SunMSCAPI provider leaks memory and keys

[Mat Carter]

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Use the correct API for freeing key handles when directed to by the output of CryptAcquireCertificatePrivateKey [1].
Specifically when [out] pfCallerFreeProvOrNCryptKey is true we test [out] pdwKeySpec for the CERT_NCRYPT_KEY_SPEC flag.  When flag bit is set we now call NCryptFreeObject, otherwise we continue to call CryptReleaseContext (as before)

[1] https://learn.microsoft.com/en-us/windows/win32/api/wincrypt/nf-wincrypt-cryptacquirecertificateprivatekey

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Commit messages:
 - Merge branch 'openjdk:master' into ncrypt
 - Fix handle leak

Changes: https://git.openjdk.org/jdk/pull/12891/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12891&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303607
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/12891.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12891/head:pull/12891

PR: https://git.openjdk.org/jdk/pull/12891