[jdk24u] RFR: 8349348: Refactor ClassLoaderDeadlock.sh and Deadlock.sh to run fully in java

[Shivangi Gupta]

Straight Backport.

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Commit messages:
 - Backport 32d6d031514be9cfee5b0fd778cb738b7ff9d770

Changes: https://git.openjdk.org/jdk24u/pull/200/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=200&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349348
  Stats: 189 lines in 4 files changed: 12 ins; 172 del; 5 mod
  Patch: https://git.openjdk.org/jdk24u/pull/200.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/200/head:pull/200

PR: https://git.openjdk.org/jdk24u/pull/200