Update Cargo.toml to add an internal_logs

[jcantrill]

add internal_logs as a soruce

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jcantrill

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[openshift-ci]

@jcantrill: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/clo-functional	01617dd	link	true	/test clo-functional
ci/prow/cluster-logging-operator-e2e	01617dd	link	true	/test cluster-logging-operator-e2e

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