Add configuration to the `ClusterExtension` API for disabling CRD Upgrade Safety validations

[everettraven]

A new, optional, field should be introduced to the ClusterExtension API spec for enabling/disabling the CRD Upgrade Safety preflight checks. The default state should be enabled.

[rashmigottipati]

PR created in rukpak: operator-framework/rukpak#902

[rashmigottipati]

operator-framework/rukpak#902 merged. This added the CRD upgrade safety preflight configuration API into rukpak.

Work to transplant this logic into operator controller is currently blocked by #846 and will be tracked by #877