RFR: 6626: The halt rule result should have a table of the VM operations

[Suchita Chaturvedi]

Added top 5 vm operations (ordered by max time), including the thread that initiated them.
Since the halt rule was pointing to VM operation rule in its description, hence i have added the table to vm opertion rule itself where it was more related to.

The rule looks something like this now.
<img width="345" alt="image" src="https://github.com/user-attachments/assets/11ffd276-8411-470d-9faf-00e2e4803fc3">

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Commit messages:
 - 6626: The halt rule result should have a table of the VM operations

Changes: https://git.openjdk.org/jmc/pull/596/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=596&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-6626
  Stats: 43 lines in 3 files changed: 42 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/596.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/596/head:pull/596

PR: https://git.openjdk.org/jmc/pull/596