fix(radio-group): wrong dirty state (#13261)

Co-authored-by: Simeon Simeonoff <[email protected]>

Author: SisIvanova

projects/igniteui-angular/src/lib/directives/radio/radio-group.directive.ts

@@ -600,8 +600,3 @@ export class IgxRadioGroupDirective implements AfterContentInit, AfterViewInit,
         }
     }
 }
-
-/**
- * @hidden
- */
-

projects/igniteui-angular/src/lib/radio/radio.component.ts

@@ -504,7 +504,9 @@ export class IgxRadioComponent implements AfterViewInit, ControlValueAccessor, E
         this.value = this.value ?? value;
 
         if (value === this.value) {
-            this.select();
+            if (!this.checked) {
+                this.checked = true;
+            }
         } else {
             this.deselect();
         }