Adding Accepted and ResolvedRefs conditions to InferencePool

[robscott]

Fixes #190
Fixes #444

/cc @danehans @ahg-g @kfswain @nicolexin

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In response to this:

Fixes #190
Fixes #444

/cc @danehans @ahg-g @kfswain @nicolexin

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[kfswain]

/lgtm
/approve

Thanks!

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This pull-request has been approved by: kfswain, robscott

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[nicolexin]

Thank you so much Rob!

Just one minor nit: Can we also update the default on line 177? I am assuming the CRD is going to be initialized with this, currently still refers to the "Ready" type.

// +kubebuilder:default={{type: "Ready", status: "Unknown", reason:"Pending", message:"Waiting for controller", lastTransitionTime: "1970-01-01T00:00:00Z"}}

[nicolexin]

Another nit I noticed:
On line 235, line 239, line 244: Do we want to call these const InferencePoolConditionResolvedRefs / InferencePoolReaonResolvedRefs / InferencePoolReasonInvalidExtensionRef instead?

(they all have the Model* prefix right now)