fix(input-group) remove color inherit from the borrder type input since it prevents the user to set filled text color. (#12813)

Co-authored-by: Stamen Stoychev <[email protected]>

Author: desig9stein

projects/igniteui-angular/src/lib/core/styles/components/input/_input-group-theme.scss

@@ -783,7 +783,6 @@
         padding-block: 0;
         border: none;
         outline-style: none;
-        color: inherit;
         z-index: 1;
     }