RFR: 8343783: Improve asserts in concurrentHashTable.inline.hpp

[Thomas Schatzl]

Hi all,

  please review this simple change to improve the asserts in the CHT to get more information if/when there is a failure like in JDK-8337216.

Testing: gha

Thanks,
  Thomas

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Commit messages:
 - 8343783

Changes: https://git.openjdk.org/jdk/pull/21970/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21970&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343783
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/21970.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21970/head:pull/21970

PR: https://git.openjdk.org/jdk/pull/21970