RFR: 8294972: Convert jdk.jlink internal plugins to use the Classfile API [v8]

[Adam Sotona]

> jdk.jlink internal plugins are heavily using ASM
> 
> This patch converts ASM calls to Classfile API.
> 
> Please review.
> Thanks,
> Adam

Adam Sotona has updated the pull request incrementally with one additional commit since the last revision:

  fixed SystemModulesPlugin

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12944/files
  - new: https://git.openjdk.org/jdk/pull/12944/files/91bf43f6..49c80bcd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12944&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12944&range=06-07

  Stats: 372 lines in 1 file changed: 38 ins; 21 del; 313 mod
  Patch: https://git.openjdk.org/jdk/pull/12944.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12944/head:pull/12944

PR: https://git.openjdk.org/jdk/pull/12944