RFR: 7903711: Rewrite simple methods ANC plugin to classfile API [v3]

[Alexandre Iline]

> Rewritten using JDK 22.
> 
> openjdk.jcov.filter.simplemethods.InstructionIterator make the code a lot simpler.
> 
> No change needed to tests, except to change from ASM ClassNode to ClassModel from the classfile API

Alexandre Iline has updated the pull request incrementally with one additional commit since the last revision:

  Addressing review comments

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Changes:
  - all: https://git.openjdk.org/jcov/pull/44/files
  - new: https://git.openjdk.org/jcov/pull/44/files/27aad11b..07524d71

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jcov&pr=44&range=02
 - incr: https://webrevs.openjdk.org/?repo=jcov&pr=44&range=01-02

  Stats: 16 lines in 6 files changed: 6 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jcov/pull/44.diff
  Fetch: git fetch https://git.openjdk.org/jcov.git pull/44/head:pull/44

PR: https://git.openjdk.org/jcov/pull/44