config.toml: add exception for rukpak

[kolyshkin]

Joe Lanford says:

We copy this binary into a scratch image, so it needs to be statically compiled. It does not do any crypto.

Since this binary will also be in a future releases, place it in a global config.

Tested with:

$ ./check-payload scan payload -u registry.ci.openshift.org/ocp/release:4.14.0-0.nightly-2023-09-21-002530 -V 4.14
...
---- Successful run

[openshift-ci[bot]]

@kolyshkin: all tests passed!

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[openshift-ci[bot]]

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