RFR: 8377446: Improve parameter naming in pointer_delta()

[Thomas Schatzl]

Hi all,

  please review this renaming of arguments to `pointer_delta`, instead of `left` and `right` use `high` and `low` (address) to (imo) better indicate the expected meaning of the arguments.

Testing: gha

Thanks,
  Thomas

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Commit messages:
 - * typo
 - 8377446

Changes: https://git.openjdk.org/jdk/pull/29631/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29631&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377446
  Stats: 18 lines in 2 files changed: 4 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/jdk/pull/29631.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29631/head:pull/29631

PR: https://git.openjdk.org/jdk/pull/29631