Update CAPZ Identity Type to Service Principal

User Story:

As a HyperShift, I want to use the service principal as the identity type for CAPZ, so that the warning message about using manual service principal in the capi-provider pod goes away.

Acceptance Criteria:

Description of criteria:

• The identity type for CAPZ is set to service principal.
• The warning messages about manual service principal in the capi-provider pod are gone.

Out of Scope:

• N/A

Engineering Details:

• Manual service principal was deprecated and will be removed in the future. Further details are here title.

This does not require a design proposal.
This does not require a feature gate.