feat: update react & react-dom to v17

[Mashal-m]

Ticket

Upgrade React JS to v17

Description

• Updated react & react-dom to v17, along with react-test-renderer to respective compatible versions
• Since Enzyme does not provide support React 17 (enzymejs/enzyme#2429) or 18 (enzymejs/enzyme#2524) itself we switched to community-supported project that aim to provide compatibility between Enzyme and React 17, replacing enzyme-adapter-react-16 with @wojtekmaj/enzyme-adapter-react-17
• Updated edx package @edx/frontend-platform
• Updated paragon to fix react-loading-skeleton issue

How Has This Been Tested?

Please describe in detail how you tested your changes.

Screenshots/sandbox (optional):

Include a link to the sandbox for design changes or screenshot for before and after. Remove this section if its not applicable.

Before	After

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/vanguards to do it.
• 🎉 🙌 Celebrate! Thanks for your contribution.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0513e6c) 85.36% compared to head (478da7a) 85.36%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #938   +/-   ##
=======================================
  Coverage   85.36%   85.36%           
=======================================
  Files         109      109           
  Lines        2125     2125           
  Branches      607      607           
=======================================
  Hits         1814     1814           
  Misses        296      296           
  Partials       15       15           

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