Update CLI generate clusterconfig description for provider flag

[sp1999]

Issue #, if available:

Description of changes:

Testing (if applicable):

Documentation added/planned (if applicable):

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.46%. Comparing base (6b626bb) to head (6833c2a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7888   +/-   ##
=======================================
  Coverage   73.46%   73.46%           
=======================================
  Files         577      577           
  Lines       35740    35740           
=======================================
  Hits        26256    26256           
  Misses       7827     7827           
  Partials     1657     1657           

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[sp1999]

/retest

[abhay-krishna]

/lgtm
/approve

[eks-distro-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abhay-krishna

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[sp1999]

/cherrypick release-0.19

[eks-distro-pr-bot]

@sp1999: new pull request created: #7889

In response to this:

/cherrypick release-0.19

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