fix: add default managementState as Removed to allow new components to show up in old DSCs, fixes RHOAIENG-14194

[dhirajsb]

Description

Add default managementState as Removed to allow new components to show up in old DSCs
Without the default managementState, K8s apiserver uses an empty component object with unspecified management state. Even though the operator treats that as Removed, it's better to have that specified explicitly as the default value in the CRD.
Fixes RHOAIENG-14194

How Has This Been Tested?

Tested manually by manually removing a component from a CRD, putting it back but with a default managementState value in the CRD.

To test it manually by temporarily removing the modelmeshserving component and adding it back again, try the commands:

# remove component from DSC
oc patch dsc default-dsc --type=json -p='[{"op": "remove", "path": "/spec/components/modelmeshserving"}]'
# verify component is empty
oc get dsc default-dsc -o jsonpath="{.spec.components.modelmeshserving}"
# grab the old component CRD in mm.json
oc get crd datascienceclusters.datasciencecluster.opendatahub.io -o json | jq -r '.spec.versions[0].schema.openAPIV3Schema.properties.spec.properties.components.properties.modelmeshserving' > mm.json
# remove the component from CRD
oc patch crd datascienceclusters.datasciencecluster.opendatahub.io --type=json -p='[{"op": "remove", "path": "/spec/versions/0/schema/openAPIV3Schema/properties/spec/properties/components/properties/modelmeshserving"}]'
# try to get the missing component from DSC
oc get dsc default-dsc -o jsonpath="{.spec.components.modelmeshserving}"
# put the component back in the CRD as if it was a new component
oc patch crd datascienceclusters.datasciencecluster.opendatahub.io --type='json' -p='[{"op": "add", "path": "/spec/versions/0/schema/openAPIV3Schema/properties/spec/properties/components/properties/modelmeshserving", "value": '"$(cat mm.json)"'}]'
# add default value for component managementState
oc patch crd datascienceclusters.datasciencecluster.opendatahub.io --type=json -p='[{"op": "add", "path": "/spec/versions/0/schema/openAPIV3Schema/properties/spec/properties/components/properties/modelmeshserving/properties/managementState/default", "value": "Removed"}]'
# get the missing component from DSC with expected default managementState
oc get dsc default-dsc -o jsonpath="{.spec.components.modelmeshserving}"

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Merge criteria

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• Commit messages are meaningful - have a clear and concise summary and detailed explanation of what was changed and why.
• Pull Request contains a description of the solution, a link to the JIRA issue, and to any dependent or related Pull Request.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

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[ykaliuta]

looks ok for me

[dhirajsb]

@VaishnaviHire , @zdtsw please approve to include in 2.15 code freeze next week.

[zdtsw]

@VaishnaviHire , @zdtsw please approve to include in 2.15 code freeze next week.

i've made #1300 to only do the change for ModelReg and keep other component as-is

[dhirajsb]

Closing as deferred for the future.