Rework the Data for testing the model inferencing endpoint section to focus on the default example setups.

[adelton]

Description

Rework the Data for testing the model inferencing endpoint section to focus on the default example setups.

The original content has a very strong "You will need to create a ConfigMap ..." at the start and "prepared test data configmaps, which you can use" but when following the two example models (bike rentals and housing), nothing needs to be created or used explicitly -- oc apply -k takes care of everything.

How Has This Been Tested?

Not tested.

Merge criteria:

• [ ] The commits are squashed in a cohesive manner and have meaningful messages.
• [ ] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• [ ] The developer has manually tested the changes and verified that the changes work

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adelton, MarianMacik

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