admin - How would I add a link to the profile editing page of the dashboard? in WordPress

I assume you mean /wp-admin/profile.php page and want to hide native password fields.

Try this (just test if form works ok with it):

add_filter( 'show_password_fields', 'modify_profile_password' );
function modify_profile_password( $show ) { ?>
 <tr id="password">
 <th>
Change your password at</th>
 <td>
<a href="">
password change page</a>
</td>
 </tr>
 <?php return false;
}