feat: updated frontend-build & frontend-platform major versions

[BilalQamar95]

Description
Major version upgrades, Updating frontend-build to v14 & frontend-platform to v8 along with respective edx packages

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.98%. Comparing base (ef8e20f) to head (1c755d0).
Report is 12 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #374   +/-   ##
=======================================
  Coverage   94.98%   94.98%           
=======================================
  Files         139      139           
  Lines        1355     1356    +1     
  Branches      264      265    +1     
=======================================
+ Hits         1287     1288    +1     
  Misses         60       60           
  Partials        8        8           

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[lkatsikaris]

I tried this in my forked repository, merging master branch with this one, and all tests passed correctly and the MFE functionality is working well too.