chore: Helm chart option to set POD container name

[udhos]

Fixes #7383

Description

Helm chart option to set POD container name.

Several of our observability tools rely on POD container name and "controller" is too much generic.

This change adds this option to values.yaml:

controller:
  # -- Distinguishing container name (containerName: karpenter-controller).
  containerName: controller

How was this change tested?

Using "helm template" to check it defaults to current setting (controller) and allows defining a new container name.

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.

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[Vacant2333]

/lgtm

[jonathan-innis]

LGTM 🚀

[jonathan-innis]

/karpenter snapshot

[github-actions]

Snapshot successfully published to oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot/karpenter:0-382ebe09b4d15c08376e1c5c7ef92b18ae148b75.
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 "0-382ebe09b4d15c08376e1c5c7ef92b18ae148b75" --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 12023479404

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 142 unchanged lines in 17 files lost coverage.
• Overall coverage decreased (-17.3%) to 65.122%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/providers/instancetype/instancetype.go	1	95.98%
pkg/test/options.go	1	93.33%
pkg/test/nodeclass.go	1	98.98%
pkg/test/environment.go	2	96.06%
pkg/providers/instancetype/types.go	3	96.67%
pkg/controllers/controllers.go	4	0.0%
pkg/providers/amifamily/ami.go	5	94.44%
pkg/controllers/nodeclass/hash/controller.go	5	70.49%
pkg/operator/options/options.go	6	74.29%
pkg/controllers/nodeclass/termination/controller.go	6	59.68%

Totals
Change from base Build 11944648017:	-17.3%
Covered Lines:	5732
Relevant Lines:	8802

---

💛 - Coveralls

[asherf]

this breaks when setting a different container name, fix: #7533