chore: Convert all AWS providers to interfaces

[jonathan-innis]

Fixes #N/A

Description

This change adds interfaces for all of the provider clients to allow for mocking of the Providers to ease some of the testing burden for mocking out the underlying data.

How was this change tested?

make presubmit
/karpenter snapshot

Does this change impact docs?

• Yes, PR includes docs updates
• Yes, issue opened: #
• No

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

[jonathan-innis]

/karpenter snapshot

[netlify]

✅ Deploy Preview for karpenter-docs-prod canceled.

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🔨 Latest commit	da51b1d
🔍 Latest deploy log	https://app.netlify.com/sites/karpenter-docs-prod/deploys/66147a2d3994f70008e0b004

[github-actions]

Snapshot successfully published to oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot/karpenter:0-c0cd24f7b7abfb4a48172e2e186c6469c86744d2.
To install you must login to the ECR repo with an AWS account:

aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin 021119463062.dkr.ecr.us-east-1.amazonaws.com

helm upgrade --install karpenter oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot/karpenter --version "0-c0cd24f7b7abfb4a48172e2e186c6469c86744d2" --namespace "kube-system" --create-namespace \
  --set "settings.clusterName=${CLUSTER_NAME}" \
  --set "settings.interruptionQueue=${CLUSTER_NAME}" \
  --set controller.resources.requests.cpu=1 \
  --set controller.resources.requests.memory=1Gi \
  --set controller.resources.limits.cpu=1 \
  --set controller.resources.limits.memory=1Gi \
  --wait

[coveralls]

Pull Request Test Coverage Report for Build 8607811494

Details

• 93 of 107 (86.92%) changed or added relevant lines in 20 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 82.261%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controllers/controllers.go	0	1	0.0%
pkg/providers/instancetype/instancetype.go	6	7	85.71%
pkg/providers/launchtemplate/launchtemplate.go	13	14	92.86%
pkg/providers/pricing/pricing.go	11	12	91.67%
pkg/providers/sqs/sqs.go	5	6	83.33%
pkg/providers/subnet/subnet.go	6	7	85.71%
pkg/operator/operator.go	0	8	0.0%

Totals
Change from base Build 8603714153:	0.02%
Covered Lines:	5333
Relevant Lines:	6483

---

💛 - Coveralls

[engedaam]

LGTM 🚀