chore: cache azure-cni and azure-ipam

[rbtr]

What type of PR is this?

/kind feature

What this PR does / why we need it: Caches azure-cni and azure-ipam, which replace and deprecate cni-dropgz as the preferred containers for installing the CNI plugins in AKS.

Which issue(s) this PR fixes:

https://github.com/Azure/azure-container-networking/issues/2333

Requirements:

• [x] uses conventional commit messages
• [ ] includes documentation
• [ ] adds unit tests
• [ ] tested upgrade from previous version

Special notes for your reviewer:

Release note:

none

[coveralls]

Pull Request Test Coverage Report for Build 9387633453

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 75.969%

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Totals
Change from base Build 9379693064:	0.0%
Covered Lines:	2627
Relevant Lines:	3458

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💛 - Coveralls

[azure-pipelines[bot]]

There was an error handling pipeline event 65648099-d92a-465c-83a3-6d85dfcd5e27.