fix: ensure validation error icon is the correct color

The `status="danger"` attribute sets the icon color and fill to red 700,
but the form invalid color in ng-clarity is different. I think it's best
to keep the `status="danger"` attribute for semantics/intention simply
set the color and fill on the validation icons to the form invalid color.

closes #305

projects/angular/src/forms/styles/_containers.clarity.scss

@@ -119,6 +119,7 @@
   .clr-validate-icon {
     @include min-equilateral($clr-forms-icon-size);
     @include css-var(color, clr-forms-invalid-color, $clr-forms-invalid-color, $clr-use-custom-properties);
+    @include css-var(fill, clr-forms-invalid-color, $clr-forms-invalid-color, $clr-use-custom-properties);
     display: none;
     margin-left: -1 * $clr_baselineRem_1;
   }
@@ -130,6 +131,7 @@
     .clr-validate-icon {
       display: inline-block;
       @include css-var(color, clr-forms-valid-color, $clr-forms-valid-color, $clr-use-custom-properties);
+      @include css-var(fill, clr-forms-valid-color, $clr-forms-valid-color, $clr-use-custom-properties);
       margin-left: -0.2rem;
     }
     .clr-subtext {