Add "--region" parameter of eksctl CLI

[davidshtian]

Issue

In deployment guide, some eksctl CLI lack of "--region" parameter.

Description

Add "--region" parameter of eksctl CLI

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @davidshtian. Thanks for your PR.

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[codecov-commenter]

Codecov Report

Merging #2227 (a36cf8f) into main (7b24e4e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2227   +/-   ##
=======================================
  Coverage   52.39%   52.39%           
=======================================
  Files         133      133           
  Lines        7257     7257           
=======================================
  Hits         3802     3802           
  Misses       3158     3158           
  Partials      297      297           

---

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[kishorj]

Thanks for the contribution.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: davidshtian, kishorj

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Needs approval from an approver in each of these files:

• OWNERS [kishorj]

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