fix: (CXSPA-8034) remove aria label from title dropdown

  * add ngSelectA11y directive back to the select component
  * set searchable property of title select to true.

feature-libs/user/profile/components/register/register.component.html

@@ -21,10 +21,10 @@
                 'register.titleOptional' | cxTranslate
               }}</span>
               <ng-select
-                [clearable]="false"
                 [items]="titles$ | async"
                 [placeholder]="'register.selectTitle' | cxTranslate"
-                [searchable]="false"
+                [searchable]="true"
+                [clearable]="false"
                 bindLabel="name"
                 bindValue="code"
                 formControlName="titleCode"