fix: amplify configure with auth userGroups

[ashwinkumar6]

Description of changes

Amplify configure with auth user groups throws a type error not assignable to type 'Record<string, UserGroupPrecedence>[]'. This PR loosens this type to avoid this error.

Issue #, if available

#14045

Description of how you validated changes

• Tested that the following with amplify.configure does not throw any type error

  "auth": {
    "groups": [
      {
        "ADMIN": { "precedence": 0 },
        "USER": { "precedence": 1 }
      },
      {
        "USER": { "precedence": 0 }
      },
      {
        "TEST": { "precedence": 2 },
        "USER": { "precedence": 1 },
        "ADMIN": { "precedence": 0 }
      }
    ],

• amplify.getConfig returns the correct config

Checklist

• PR description included
• yarn test passes
• Unit Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

Checklist for repo maintainers

• Verify E2E tests for existing workflows are working as expected or add E2E tests for newly added workflows
• New source file paths included in this PR have been added to CODEOWNERS, if appropriate

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[ashwinkumar6]

This test just checks if outputs is parsed correctly (which already works), adding this in as a sanity check.
Ideally to catch this issue, we would need to amplify.configure from an external json file, can add this as a fast follow