RFR: 8330535: Update nsk/jdb tests to use driver instead of othervm

[Leonid Mesnik]

The nsk/jdb tests updated to use driver instead of othervm. The nsk/share/jdb code updated to set correct classpath and  throw Exceptions instead of exit.

Testing by running tests with different flags and in different CI modes.

The 'shouldPass()' might be changed to throw SkippedException but I am going to do this separately.

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Commit messages:
 - updated tests

Changes: https://git.openjdk.org/jdk/pull/20518/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20518&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330535
  Stats: 482 lines in 69 files changed: 6 ins; 272 del; 204 mod
  Patch: https://git.openjdk.org/jdk/pull/20518.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20518/head:pull/20518

PR: https://git.openjdk.org/jdk/pull/20518