Skipped setup for camel-k using nexus deployment on ppc64le

[Siddhesh-Prabhu]

For test TestMavenCASecret, as sonatype/nexus3:3.30.0 is not supported on ppc64le platform, need to skip the part of nexus deployment and use directly globally installed camel-k operator for integration.

Release Note

NONE

[squakez]

If we still want to maintain the test, we can skip it entirely when the platform detected is different than the one expected, as we're doing for openshift. In such case we can introduce some environment variable to control the behavior.

[github-actions[bot]]

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