RFR: 8296: No Java process should ever be PID 1

[Hendrik]

Happy to get feedback

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Commit messages:
 - 8296: add jfr with pid1, add texts, adjusted rule
 - 8296: added log statement
 - 8296: add rule for warning when process run with PID1

Changes: https://git.openjdk.org/jmc/pull/613/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=613&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8296
  Stats: 487 lines in 8 files changed: 486 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/613.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/613/head:pull/613

PR: https://git.openjdk.org/jmc/pull/613