Correct intervals for periodic-kubernetes-bazel-test jobs

[spiffxp]

The canary and main jobs were swapped, but their intervals were not.
The main job should be running more frequently than the canary

This addresses #18652 (comment)

Followup to #18613
Part of #18652

[spiffxp]

FYI @kubernetes/ci-signal
/cc @ameukam @BenTheElder

[hasheddan]

/lgtm

[k8s-ci-robot]

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[k8s-ci-robot]

@spiffxp: Updated the job-config configmap in namespace default at cluster default using the following files:

• key bazel-build-test.yaml using file config/jobs/kubernetes/sig-testing/bazel-build-test.yaml

In response to this:

The canary and main jobs were swapped, but their intervals were not.
The main job should be running more frequently than the canary

This addresses #18652 (comment)

Followup to #18613
Part of #18652

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