[data] remove cluster autoscaler v1

[iamjustinhsu]

Description

As titled, the deprecation period of 6 months has passed, and we are finally removing the cluster autoscaler V1

Related issues

Link related issues: "Fixes #1234", "Closes #1234", or "Related to #1234".

Additional information

Optional: Add implementation details, API changes, usage examples, screenshots, etc.

[gemini-code-assist]

Code Review

This pull request removes the deprecated V1 cluster autoscaler (DefaultClusterAutoscaler) and sets V2 as the default cluster autoscaler version.

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[cursor]

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