feat: add release scripts

[tallaxes]

Description

Add release and snapshot scripts, ksnap.azurecr.io ACR for snapshots

• All releases (including snapshots) generate images for self-hosted and NAP (extra -aks in the tag), and Helm charts (referencing corresponding self-hosted images). Helm charts are packaged published to ACR as OCI artifacts.
• Snapshot releases can be generated with make snapshot, use commit hash as tag. Shapshot releases go to ksnap.azurecr.io, and are retained for 30 days. (See bicep template for ksnap.)
• Stable releases can be generated with make release, expected to be published to ACR onboarded to MCR. Stable releases have images locked after publishing (--write-enabled false --delete-enabled false).
• The corresponding feat: add Helm-based install process #148 adds and documents the process for consuming these stable or snapshot releases, deploying Karpenter via Helm charts
• Base images changed to mcr.microsoft.com/cbl-mariner/distroless/minimal:2.0-nonroot

How was this change tested?

• make snapshot

Does this change impact docs?

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

Release Note

[coveralls]

Pull Request Test Coverage Report for Build 8654721864

Details

• 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 97.761%

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Totals
Change from base Build 8653139509:	0.0%
Covered Lines:	35672
Relevant Lines:	36489

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💛 - Coveralls

[charliedmcb]

Overall, looking good, but have a few nits/questions.

[charliedmcb]

Overall, the release process for creating a snapshot was generall smooth. I do have some suggestions noted.

Additionally, the karpenter pod I created with the current commit snapshot, and the helm based install process PR did result in a CrashLoopBackOff which I will look into further:
https://github.com/Azure/karpenter-provider-azure/pull/148/files

[charliedmcb]

Looking good

[charliedmcb]

lgtm!