CosmosFullnode should allow setting starting ordinal

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Like a StatefulSet

Plan to update operator code.

• Add a field under spec called ordinal which contains a field named start of type int32 inside type PodSpec (Used by CosmosFullNode )
• Use default Start as 0 if PodSpec Ordinal' s Start value is not set.
• Update NewPodBuilder function to use the field as appropriate (Used by BuildPods function in build_pods.go)
• Add required tests and update any tests as needed.
• Create the test image from branch.
• operator release
• Deploy Operator to a test cluster and verify ability to use any StartingOrdinal.

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https://github.com/strangelove-ventures/cosmos-operator/releases/tag/v0.24.0