[crac] RFR: Drop perfdata and cppath

[Radim Vansa]

On Wed, 27 Sep 2023 20:40:53 GMT, Radim Vansa <rvansa at openjdk.org> wrote:

> Storing PerfMemory contents into file might be fragile; if the file is corrupted (e.g. due to wrong permissions) JVM might receive SIGBUS when updating performance counters after restore.
> This commit provides alternate solution, moving the shared file-mapped memory into private anonymous memory during C/R.

Added `jcmd <pid> PerfCounter.print` as requested.

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PR Comment: https://git.openjdk.org/crac/pull/119#issuecomment-1743637518