[RHOAIENG-6880] Disable homePage feature flag for RHOAI deployments

[jeff-phillips-18]

Closes: RHOAIENG-6880

Description

The disableHome flag was inadvertently set to false for the RHOAI odhDashbardConfig spec.

Test Impact

On the nightly build of a RHOAI deployment, verify the home page is not show and the initial page is the enabled application page.

Request review criteria:

• The developer has manually tested the changes and verified that the changes work
• Commits have been squashed into descriptive, self-contained units of work (e.g. 'WIP' and 'Implements feedback' style messages have been removed)
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).

[andrewballantyne]

This should resolve that issue -- minor annoyance as we work through enabling the feature.

[openshift-ci]

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