ci: Update SSM parameter to use AL2 instead of AL

[jonathan-innis]

Fixes #N/A

Description

Fixes an issue where our current SSM alias was pointing to an AMI (AL) that has been deprecated since December. This change updates the SSM alias to point it to AL2 instead.

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.

[netlify]

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[jonathan-innis]

/karpenter snapshot

[coveralls]

Pull Request Test Coverage Report for Build 7494985207

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 82.547%

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Totals
Change from base Build 7494827506:	0.0%
Covered Lines:	4952
Relevant Lines:	5999

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💛 - Coveralls

[github-actions]

Snapshot successfully published to oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot/karpenter:v0-aff20157a565a035c0e9aba60a1d976f4f543b9e.
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

[engedaam]

LGTM 🚀