RFR: 8330606: Redefinition doesn't but should verify the new klass [v2]

[Coleen Phillimore]

> This change adds a couple of comments, removes some ancient bootstrapping code, and adds an old test that we call the verifier for redefining a class, even one in the bootclass path.
> Tested with tier1-4.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Updated the test with some comments.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22116/files
  - new: https://git.openjdk.org/jdk/pull/22116/files/667232c7..af6b1e12

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22116&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22116&range=00-01

  Stats: 4 lines in 1 file changed: 2 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22116.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22116/head:pull/22116

PR: https://git.openjdk.org/jdk/pull/22116