UX: Sort plugin list and plugin search output by plugin name

[chandrareddyp]

What this PR does / why we need it

This pull request sorts the plugin list output first by plugin name, and then by plugin target. Sorting the list by name and then target provides a better user experience for the end user by organizing the plugins in a consistent and easy to scan order.

Which issue(s) this PR fixes

Fixes #

Describe testing done for PR

Before the fix, the tanzu plugin list output was not sorted by the plugin's name and then target. After applying the fix, the plugins list output is now sorted by plugin name first, and then by target.

1. E2E tests are added.
2. Manual testing has done for tanzu plugin list, below is the output:
   2.a) Before Fix: tanzu plugin list output:
   

2.b) After Fix: tanzu plugin list output:
You can see the plugins has been sorted by plugin name's, and the 'cluster' plugin has been sorted by target.

3. Manual testing has done for tanzu plugin search, below is the output:
   3.a) Before fix: tanzu plugin search output:
   
   3.b) After Fix: tanzu plugin search output:
   

Release note

The `tanzu plugin list` and `tanzu plugin search` outputs are now sorted by plugin names instead of by targets.

Additional information

Special notes for your reviewer

[marckhouzam]

The PR also improves the list order for tanzu plugin search. Could you mention that in the PR description and especially in the release notes?

Could you make the release notes more clear? The current message: "The tanzu plugin list output is now sorted by plugin names and targets." does not convey what changed for someone not close to the CLI. How about saying "The tanzu plugin list and tanzu plugin search outputs are now sorted by plugin names instead of by targets." Note that I don't think you need to mention the second sort criteria: the users will mostly pay attention to the main sorting criteria.

The code LGTM
Thanks!

[chandrareddyp]

The PR also improves the list order for tanzu plugin search. Could you mention that in the PR description and especially in the release notes?

Could you make the release notes more clear? The current message: "The tanzu plugin list output is now sorted by plugin names and targets." does not convey what changed for someone not close to the CLI. How about saying "The tanzu plugin list and tanzu plugin search outputs are now sorted by plugin names instead of by targets." Note that I don't think you need to mention the second sort criteria: the users will mostly pay attention to the main sorting criteria.

The code LGTM Thanks!

@marckhouzam thank you for suggestion, actually i though of addressing the tanzu plugin search in separate PR, but the same sort logic code is being used for both, so i have added e2e tests for both use cases.

Yes i have updated the release note. thanks.