feat: move amplify js v6 to latest

[letsbelopez]

Problem

Amplify JS UI React just moved v6 to latest and we need to render v6 code as latest.

Solution

Update v6 feature flag

Additional Notes

Links

Ticket

GitHub issue:

Other links

Verification

Manual tests

Automated tests

• Unit tests added/updated
• E2E tests added/updated
• N/A - (provide a reason) feature flag update only. We already have a bunch of unit tests that tests this feature flag being on and off.
• deferred - (provide GitHub issue for tracking)

Housekeeping

• No non-essential console logs
• All new files contain license notice

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

Merging #1135 (58a159b) into main (a7c9f73) will not change coverage.
The diff coverage is 100.00%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1135   +/-   ##
=======================================
  Coverage   93.85%   93.85%           
=======================================
  Files         149      149           
  Lines        6104     6104           
  Branches     1834     1834           
=======================================
  Hits         5729     5729           
  Misses        357      357           
  Partials       18       18           

Files	Coverage Δ
...egen-ui-react/lib/helpers/amplify-js-versioning.ts	100.00% <100.00%> (ø)

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