fix(stepper): add clamp function to values to prevent indicator background being cut (#13981)

Author: didimmova

projects/igniteui-angular/src/lib/core/styles/components/stepper/_stepper-theme.scss

@@ -356,10 +356,10 @@
     $separator-position: 50%;
 
     $outline-width: map.get((
-        material: rem(1px),
-        fluent: rem(1px),
-        bootstrap: rem(1px),
-        indigo-design: rem(2px)
+        material: clamp(1px, rem(1px), rem(1px)),
+        fluent: clamp(1px, rem(1px), rem(1px)),
+        bootstrap: clamp(1px, rem(1px), rem(1px)),
+        indigo-design: clamp(2px, rem(2px), rem(2px))
     ), $variant);
 
     $separator-size: map.get((