[CMSDS-3663] Removes usage of legacy Children API from Autocomplete utility

[tamara-corbalt]

Summary

• Refactors the getTextFieldChild utility used by Autocomplete to remove usage on React’s legacy Children API.
• Normalizes children to an array (when not already an array) and iterates directly to return the TextField element.
• Adds unit tests to verify parity to the original version.
  Jira ticket

How to test

• Run unit tests npm run test:unit -t Autocomplete
• For parity verification: replace the updated function in utils.tsx with the original version below and re-run the tests.

export function getTextFieldChild(children: ReactNode): ReactElement<any> | undefined {
  let textField: ReactElement<any> | undefined;
  Children.forEach(children, (child) => {
    if (isTextField(child)) {
      textField = child;
    }
  });
  return textField;
}

Checklist

• Prefixed the PR title with the Jira ticket number as [CMSDS-####] Title or [NO-TICKET] if this is unticketed work.
• Selected appropriate Type (only one) label for this PR, if it is a breaking change, label should only be Type: Breaking
• Selected appropriate Impacts, multiple can be selected.
• Selected appropriate release milestone

[jack-ryan-nava-pbc]

This works great. Tests pass. Minor non-blocking comment. Thanks for doing this!

[jack-ryan-nava-pbc]

The tests pass (wahoo!) however I find these throws to be a bit noisy. Is there a way to mute the console output?

[tamara-corbalt]

Yep good call, just added this commit, which should take the noise factor down on these. Thanks for catching that!