feat(tabs scrolling): add min-width to parent container (#12660)

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

Author: Katrin

projects/igniteui-angular/src/lib/core/styles/components/tabs/_tabs-theme.scss

@@ -556,10 +556,12 @@
 
     %tabs-header-scroll--end {
         justify-content: flex-end;
+        min-width: max-content;
     }
 
     %tabs-header-scroll--center {
         justify-content: center;
+        min-width: max-content;
     }
 
     %tabs-header-scroll--justify {