RFR: 8349348: Refactor ClassLoaderDeadlock.sh and Deadlock.sh to run fully in java

[Mikhail Yankelevich]

Refactor the following to run fully in java:
test/java/security//Security/ClassLoaderDeadlock/ClassLoaderDeadlock.sh
test/java/security//Security/ClassLoaderDeadlock/Deadlock.sh

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Commit messages:
 - JDK-8349348: Refactor ClassLoaderDeadlock.sh and Deadlock.sh to run fully in java

Changes: https://git.openjdk.org/jdk/pull/23440/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23440&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349348
  Stats: 191 lines in 4 files changed: 14 ins; 172 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/23440.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23440/head:pull/23440

PR: https://git.openjdk.org/jdk/pull/23440