feat: Add the Node Overlay CRD

[engedaam]

Fixes #N/A

Description
This PR introduces the NodeOverlay CRD, a new Karpenter API that enables fine-tuning of the scheduling simulation for advanced use cases.

Features

• Implemented NodeOverlay CRD based on the Node Overlay RFC
  • requirements: Constrain when the NodeOverlay is applied
  • priceAdjustment: Modify the simulated price of matching nodes
  • capacity: Add extended resources to matching nodes
• Added Common Expression Language (CEL) rules for CRD validation
• Included unit tests to validate CEL rules

Example Usage

apiVersion: karpenter.sh/v1alpha1
kind: NodeOverlay
metadata:
  name: adjustment
spec:
  requirements:
    - key: karpenter.sh/capacity-type
      operator: In
      values: ["spot"]
  priceAdjustment: "0.109"
  capacity:
     smarter-devices/fuse: 1

How was this change tested?

• make presubmit

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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[coveralls]

Pull Request Test Coverage Report for Build 15624727004

Details

• 86 of 197 (43.65%) changed or added relevant lines in 7 files are covered.
• 11 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.6%) to 81.33%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/apis/v1alpha1/nodeoverlay.go	0	9	0.0%
pkg/apis/v1alpha1/nodeoverlay_status.go	0	11	0.0%
pkg/apis/v1alpha1/nodeoverlay_validation.go	51	68	75.0%
pkg/test/nodeoverlay.go	0	17	0.0%
pkg/apis/v1alpha1/zz_generated.deepcopy.go	25	82	30.49%

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/provisioning/scheduling/topologydomaingroup.go	4	86.21%
pkg/controllers/provisioning/scheduling/preferences.go	7	88.76%

Totals
Change from base Build 15622093258:	-0.6%
Covered Lines:	10324
Relevant Lines:	12694

---

💛 - Coveralls