fix/kustomization yaml no generated

[VannTen]

• Move gitattributes for config/* to a sub-file
• Don't treat config/base/kustomization.yaml as generated

[codificat]

/lgtm /approve

[sesheta]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: codificat

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[codificat]

/retest

[VannTen]

/retest-required