RFR: 8341908: CodeHeapAnalytics: Output Imperfections and unwanted vm termination

[Lutz Schmidt]

Output is properly aligned again now. Was messed up when method hotness was removed (part of method sweeper).
Assertions have been replaced by printing an error message and gracefully returning. Avoids vm crashes caused by diagnostic actions.
Some code restructuring, removal of redundancies.

Reviews are highly welcomed.

-------------

Commit messages:
 - 8341908: CodeHeapAnalytics: Output Imperfections and unwanted vm termination

Changes: https://git.openjdk.org/jdk/pull/21452/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21452&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341908
  Stats: 147 lines in 2 files changed: 72 ins; 29 del; 46 mod
  Patch: https://git.openjdk.org/jdk/pull/21452.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21452/head:pull/21452

PR: https://git.openjdk.org/jdk/pull/21452