Aligned password length requirements

Updated all password validation to use central password defaults
system while updating length requirements to now all match
at 8 characters minimum.

Some language text was technically correct (More than 7 characters)
but this has been updated for clarity and to prompt other translations
to be updated.

Closes #2237

resources/lang/en/auth.php

@@ -21,7 +21,7 @@ return [
     'email' => 'Email',
     'password' => 'Password',
     'password_confirm' => 'Confirm Password',
-    'password_hint' => 'Must be over 7 characters',
+    'password_hint' => 'Must be at least 8 characters',
     'forgot_password' => 'Forgot Password?',
     'remember_me' => 'Remember Me',
     'ldap_email_hint' => 'Please enter an email to use for this account.',

resources/lang/en/settings.php

@@ -174,7 +174,7 @@ return [
     'users_role' => 'User Roles',
     'users_role_desc' => 'Select which roles this user will be assigned to. If a user is assigned to multiple roles the permissions from those roles will stack and they will receive all abilities of the assigned roles.',
     'users_password' => 'User Password',
-    'users_password_desc' => 'Set a password used to log-in to the application. This must be at least 6 characters long.',
+    'users_password_desc' => 'Set a password used to log-in to the application. This must be at least 8 characters long.',
     'users_send_invite_text' => 'You can choose to send this user an invitation email which allows them to set their own password otherwise you can set their password yourself.',
     'users_send_invite_option' => 'Send user invite email',
     'users_external_auth_id' => 'External Authentication ID',