selftests/coredump: split out common helpers

into separate files.

Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-12-ca449b7b7aa0@kernel.org
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Christian Brauner 2025-10-28 09:45:57 +01:00
commit c71147f42b
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