feat(navbar): Adding migration for actionIcon

Author: astaev

projects/igniteui-angular/migrations/update-9_1_0/changes/classes.json

@@ -0,0 +1,9 @@
+{
+    "$schema": "../../common/schema/class.schema.json",
+    "changes": [
+        {
+            "name": "IgxActionIconDirective",
+            "replaceWith": "IgxNavbarActionDirective"
+        }
+    ]
+}

projects/igniteui-angular/migrations/update-9_1_0/changes/selectors.json

@@ -0,0 +1,10 @@
+{
+    "$schema": "../../common/schema/selector.schema.json",
+    "changes": [
+        {
+            "type": "component",
+            "selector": "<igx-action-icon",
+            "replaceWith": "<igx-icon igxNavbarAction"
+        }
+    ]
+}