related jira issue: https://bugs.openjdk.org/browse/JDK-8366716
--- Following the direction outlined in the issue description, I've extracted the common parts from `TestTracePageSizes` and `TestTransparentHugePagesHeap` to implement the `SmapsParser` test library. I've confirmed that it works without issues in my local tests. Reviews and feedback are welcome. ------------- Commit messages: - Refactor: Introduce SmapsParser Changes: https://git.openjdk.org/jdk/pull/27273/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27273&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8364927 Stats: 459 lines in 3 files changed: 234 ins; 212 del; 13 mod Patch: https://git.openjdk.org/jdk/pull/27273.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27273/head:pull/27273 PR: https://git.openjdk.org/jdk/pull/27273
