RFR: 8324513: Inline ContiguousSpace::object_iterate_from

[Albert Mingkun Yang]

Trivial refactoring of inlining a method.

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

Commit messages:
 - trivial

Changes: https://git.openjdk.org/jdk/pull/17531/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17531&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324513
  Stats: 12 lines in 2 files changed: 0 ins; 7 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/17531.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17531/head:pull/17531

PR: https://git.openjdk.org/jdk/pull/17531