feat: bumped frontend-platform to v6

[BilalQamar95]

Description:

• Major version upgrade for frontend-platform
• Updated snapshots & fixed failing tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (dcdaace) 90.61% compared to head (fcc9a05) 90.25%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #456      +/-   ##
==========================================
- Coverage   90.61%   90.25%   -0.37%     
==========================================
  Files         228      228              
  Lines        4156     4156              
  Branches      842      842              
==========================================
- Hits         3766     3751      -15     
- Misses        370      385      +15     
  Partials       20       20              

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[brian-smith-tcril]

This is only updating frontend-platform in devDependencies, it will need to be updated in peerDependencies too.

frontend-lib-content-components/package.json

Line 100 in fcc9a05

"@edx/frontend-platform": "^4.0.0 || ^5.0.0",

We also don't have anything in place to test that this will still work with frontend-platform versions < 6, so it may need to be done as a breaking change.

If that's the case, it might make sense to wait for #457 to make the breaking change commit so we don't end up with 2 major version bumps back to back.

[BilalQamar95]

Closing since package upgrades of this PR were already taken care of as part of #457