RFR: 8340089: Simplify SegmentBulkOperations::powerOfProperty

[Per Minborg]

This PR suggests to simplify the. method `SegmebtBulkOperations::powerOfPropertyOr`.

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

Commit messages:
 - Fix merge error
 - Merge master
 - Simplify further
 - Simplify method
 - Use privilegedGetProperty

Changes: https://git.openjdk.org/jdk/pull/20985/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20985&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340089
  Stats: 10 lines in 1 file changed: 0 ins; 7 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20985.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20985/head:pull/20985

PR: https://git.openjdk.org/jdk/pull/20985