RFR: 8295343: sun/security/pkcs11 tests fail on Linux RHEL 8.6 and newer

[Matthew Donovan]

Hello,

In this PR I removed NSS tests from the ProblemList and updated NssTest to use Sqlite databases. I also removed code in PKCS11Test.java that falls back to NSS libraries installed on the test system. The tests can still be run with different NSS libraries but they have to be specified by a system property. I updated `doc/testing.md` to reflect that change.

Thanks

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Commit messages:
 - 8295343: sun/security/pkcs11 tests fail on Linux RHEL 8.6 and newer

Changes: https://git.openjdk.org/jdk/pull/16294/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16294&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295343
  Stats: 105 lines in 5 files changed: 3 ins; 86 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/16294.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16294/head:pull/16294

PR: https://git.openjdk.org/jdk/pull/16294