[crac] RFR: 8348929: [CRaC] Use /tmp for restore parameters storage

[duke]

On Wed, 29 Jan 2025 08:04:58 GMT, Timofei Pushkin <tpushkin at openjdk.org> wrote:

> `CracSHM` now uses a file in `os::get_temp_directory()` instead of `shm_open`

@TimPushkin 
Your change (at version 9a29229d8409409693c8623bb5eeeb66d1e42877) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/crac/pull/197#issuecomment-2622043555