refs #19435 [finc] accessibility: add autocompletion for user creation fields

* copied from /themes/bootstrap3/templates/Auth/Database/create.phtml
** add autocomplete for first name: given-name
** add autocomplete for last name: family-name
** add autocomplete for email: email
** add autocomplete for username: username
** add autocomplete for password: new-password
** add autocomplete for password confirmation: new-password

* also add autocompletion for user fields of password reset
** add autocomplete for first name: given-name
** add autocomplete for last name: family-name
** add autocomplete for username: username
** add autocomplete for email: email