feat: upgrade react to v18

[huniafatima-99]

Description

This PR upgrades react to v18. It also updated the test cases to remove the deprecated approaches according to react 18.

How Has This Been Tested?

All the test suites were ran and they were successful. In addition, major functionalities are working when ran the MFE in the browser.

Merge Checklist

• If your update includes visual changes, have they been reviewed by a designer? Send them a link to the Sandbox, if applicable.
• Is there adequate test coverage for your changes?

Post-merge Checklist

• Deploy the changes to prod after verifying on stage or ask @openedx/edx-infinity to do it.
• 🎉 🙌 Celebrate! Thanks for your contribution.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 58.50%. Comparing base (17e12f7) to head (285f45a).

Files with missing lines	Patch %	Lines
src/index.jsx	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1220      +/-   ##
==========================================
- Coverage   58.53%   58.50%   -0.03%     
==========================================
  Files         117      117              
  Lines        2320     2321       +1     
  Branches      639      641       +2     
==========================================
  Hits         1358     1358              
- Misses        901      902       +1     
  Partials       61       61              

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[brian-smith-tcril]

Thank you so much for opening this PR! The plan for the React 18 upgrades is to use StrictMode - would you be able to update this PR to do that?

https://react.dev/reference/react/StrictMode

[huniafatima-99]

@brian-smith-tcril sure, let me update the PR.