RFR: 8321940: Improve CDSHeapVerifier in handling of interned strings [v2]

[Ioi Lam]

> The PR fixes the CDSHeapVerifier so that it no longer warns about interned strings that are not referenced by any of the archived heap object graphs. Please see the bug report for more details.
> 
> Tests: tiers 1-4, builds-tier5

Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:

  fixed typo

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17102/files
  - new: https://git.openjdk.org/jdk/pull/17102/files/842ad51c..a4701daf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17102&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17102&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17102.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17102/head:pull/17102

PR: https://git.openjdk.org/jdk/pull/17102