Removed cli unversioned image aliases

[Sandido]

ARM (Control Plane) API Specification Update Pull Request

This PR removes the image aliases that were planned to be removed months ago. The breaking change warnings have been sent out months ago in the cmdlets and in blog posts. We are moving to use only versioned aliases going forward. This same change is happening in PS here.

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Swagger Validation Report

️️✔️BreakingChange succeeded [Detail] [Expand]

There are no breaking changes.

️️✔️Breaking Change(Cross-Version) succeeded [Detail] [Expand]

There are no breaking changes.

️️✔️CredScan succeeded [Detail] [Expand]

There is no credential detected.

️️✔️LintDiff succeeded [Detail] [Expand]

Validation passes for LintDiff.

️️✔️Avocado succeeded [Detail] [Expand]

Validation passes for Avocado.

️️✔️SwaggerAPIView succeeded [Detail] [Expand]

️️✔️TypeSpecAPIView succeeded [Detail] [Expand]

️️✔️ModelValidation succeeded [Detail] [Expand]

Validation passes for ModelValidation.

️️✔️SemanticValidation succeeded [Detail] [Expand]

Validation passes for SemanticValidation.

️️✔️PoliCheck succeeded [Detail] [Expand]

Validation passed for PoliCheck.

️️✔️PrettierCheck succeeded [Detail] [Expand]

Validation passes for PrettierCheck.

️️✔️SpellCheck succeeded [Detail] [Expand]

Validation passes for SpellCheck.

️️✔️Lint(RPaaS) succeeded [Detail] [Expand]

Validation passes for Lint(RPaaS).

️️✔️PR Summary succeeded [Detail] [Expand]

Validation passes for Summary.

️️✔️Automated merging requirements met succeeded [Detail] [Expand]

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