az acr repository show-manifests is deprecated but acr manifest is in preview

### Describe the bug


By deprecating "az acr repository show-manifests" and marking "acr manifest" as preview you're effectively removing any stable and future-proof way to do something as simple as retrieving manifests from a repository.

Please either make "acr manifest" stable or remove the deprecation notice.

### Related command

az acr repository show-manifests
az acr manifest list-metadata

### Errors

This command has been deprecated and will be removed in a future release. Use 'acr manifest list-metadata' instead.

Command group 'acr manifest' is in preview and under development. Reference and support levels: https://aka.ms/CLI_refstatus

### Issue script & Debug output

-

### Expected behavior

Either no deprecation notice or no preview notice

### Environment Summary

azure-cli 2.63.0

core 2.63.0
telemetry 1.1.0

Extensions:
account 0.2.5
log-analytics 0.2.2
ssh 1.1.2

Dependencies:
msal 1.30.0
azure-mgmt-resource 23.1.1

Python location '/opt/azure-cli/bin/python'
Extensions directory '/home/simao/.azure/cliextensions'

Python (Linux) 3.12.5 (main, Aug 9 2024, 08:20:41) [GCC 14.2.1 20240805]

Legal docs and information: aka.ms/AzureCliLegal

Your CLI is up-to-date.

### Additional context

_No response_