refactor(codewhisperer): remove usage of UserGroupSettings

[Will-ShaoHua]

Problem

Remove ALL usage of userGroupSettings as we're pivoting to featureConfigProvider.ts

Solution

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License: I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

This pull request modifies code in src/ but no tests were added/updated. Confirm whether tests should be added or ensure the PR description explains why tests are not required.

[justinmk3]

Is this ready to merge? Did a Q/CW team member review it?

May need to rebase to get CI passing.

[Will-ShaoHua]

Is this ready to merge? Did a Q/CW team member review it?

yea let me rebase it and request Q team to review it.

[Will-ShaoHua]

  2631 passing (55s)
  12 pending
  1 failing
  1) startSecurityScanPerformanceTest
       Should calculate cpu and memory usage for file scans performance tests
         "after all" hook for "Should calculate cpu and memory usage for file scans - test run 10":

      AssertionError [ERR_ASSERTION]: Expected total user CPU usage for Should calculate cpu and memory usage for file scans to be less than 50. Actual user CPU usage was 67.04591225728144
      + expected - actual

      -false
      +true