RFR: 8294976: Convert Runtime classes to use the ClassFile API instead of ASM [v7]

[Oussama Louati]

> 8294976: Convert Runtime classes to use the ClassFile API instead of ASM

Oussama Louati has updated the pull request incrementally with one additional commit since the last revision:

  use withMethodBody() instead of withMethod()

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18271/files
  - new: https://git.openjdk.org/jdk/pull/18271/files/a831d2bc..0b9a8241

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18271&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18271&range=05-06

  Stats: 19 lines in 1 file changed: 0 ins; 5 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/18271.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18271/head:pull/18271

PR: https://git.openjdk.org/jdk/pull/18271