RFR: 8351345: [IR Framework] Improve reported disabled IR verification messages [v2]

[Hamlin Li]

> Hi,
> Can you help to review this trivial patch?
> Currently, it only reports that some flag is non-whitelisted, but does not print out the flag explicitly, but it's helpful to do so.
> 
> Thanks!

Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:

  refine

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23931/files
  - new: https://git.openjdk.org/jdk/pull/23931/files/e0fe7322..97a68e2e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23931&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23931&range=00-01

  Stats: 42 lines in 1 file changed: 21 ins; 9 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/23931.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23931/head:pull/23931

PR: https://git.openjdk.org/jdk/pull/23931