Update Ev2 Shell Extension Image to AzureLinux 3 for PMC Release

[anamnavi]

This pull request updates the container image configuration for the EV2 pipeline in the .pipelines/EV2Specs/ServiceGroupRoot/ServiceModel.json file. The change ensures the pipeline uses the latest AzureLinux 3 image. Per Ev2 docs there isn't a way to automatically get latest version tag and version tag is also required field so this will likely need to be updated from time to time.

Container image update:

• Changed the imageName from adm-mariner-20-l to adm-azurelinux-30-l and the imageVersion from v11 to v2 in the pipeline run configuration.

PR Summary

PR Context

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge. If this PR is a work in progress, please open this as a Draft Pull Request and mark it as Ready to Review when it is ready to merge.
• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
    • Experimental feature name(s):
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed

[TravisEz13]

/azp run PowerShell-CI-linux-packaging, PowerShell-Windows-Packaging-CI

[azure-pipelines]

Azure Pipelines could not run because the pipeline triggers exclude this branch/path.

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