NAS-141486: Improve VNC banner heading and drop unrelated password note

Claude-Session: https://claude.ai/code/session_011mVrApMQwPu6ud25e38x39

Author: AlexKarpov98

src/app/pages/vm/devices/device-form/device-form.component.html

@@ -368,8 +368,8 @@
             @if (getCurrentDisplayType() === VmDisplayType.Vnc) {
               <tn-banner
                 type="info"
-                [heading]="'Note' | translate"
-                [message]="'VNC requires a separate client application and cannot be accessed through the web browser. Password is limited to 8 characters.' | translate"
+                [heading]="'Requires separate client software' | translate"
+                [message]="'VNC requires a separate client application and cannot be accessed through the web browser.' | translate"
               ></tn-banner>
             }
           } @else {

src/app/pages/vm/vm-wizard/steps/1-os-step/os-step.component.html

@@ -134,8 +134,8 @@
 
       <tn-banner
         type="info"
-        [heading]="'Note' | translate"
-        [message]="'VNC requires a separate client application and cannot be accessed through the web browser. Password is limited to 8 characters.' | translate"
+        [heading]="'Requires separate client software' | translate"
+        [message]="'VNC requires a separate client application and cannot be accessed through the web browser.' | translate"
       ></tn-banner>
     }
   </tn-form-section>