feat: create constraints on offerings

[rschalo]

Fixes
aws/karpenter-provider-aws#3878
aws/karpenter-provider-aws#4612

Description
This change allows cloudprovider specific constraints to be added to Offering. Zone and capacityType are special labels that are used across the Karpenter codebase.

How was this change tested?
There shouldn't be the need for new tests as long as the current test suite passes. There will be additional tests required in karpenter-aws-provider in order to validate additional constraints. Starting this draft PR for discussion.

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

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: rschalo / name: Reed Schalo (de6cbd1, 0d49c1e, d45b5e0)

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[coveralls]

Pull Request Test Coverage Report for Build 9212879269

Details

• 53 of 68 (77.94%) changed or added relevant lines in 10 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.04%) to 77.94%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kwok/cloudprovider/cloudprovider.go	0	3	0.0%
kwok/cloudprovider/helpers.go	0	6	0.0%
kwok/tools/gen_instance_types.go	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/disruption/expiration.go	2	89.66%

Totals
Change from base Build 9201236655:	0.04%
Covered Lines:	8271
Relevant Lines:	10612

---

💛 - Coveralls

[jmdeal]

/assign @jmdeal

[jonathan-innis]

One comment, otherwise lgtm

[jonathan-innis]

/lgtm
/approve

[njtran]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jonathan-innis, njtran, rschalo

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• OWNERS [jonathan-innis,njtran]

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[jmdeal]

/lgtm