RFR: 8364927: Move SmapsParser from runtime/os/TestTracePageSizes.java into testlib [v2]

[jonghoonpark]

> 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.

jonghoonpark has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  Refactor: Introduce SmapsParser
  
  Signed-off-by: jonghoonpark <dev at jonghoonpark.com>

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Changes: https://git.openjdk.org/jdk/pull/27273/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27273&range=01
  Stats: 491 lines in 3 files changed: 237 ins; 243 del; 11 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