fix(snackbar): wrong button size (#16446)

Co-authored-by: Marin Popov <desig9stein@users.noreply.github.com>

Author: SisIvanova

projects/igniteui-angular/src/lib/core/styles/components/snackbar/_snackbar-theme.scss

@@ -33,7 +33,8 @@
 
         [igxButton] {
             @include animation(fade-in .35s ease-out);
-            --ig-size: 1;
+
+            --ig-size: 2;
             background: transparent;
             color: var-get($theme, 'button-color');
             -webkit-tap-highlight-color: transparent;
@@ -43,10 +44,6 @@
         @if $variant == 'indigo' {
             padding: pad-block(rem(4px)) pad-inline(rem(16px));
             min-height: rem(36px);
-
-            [igxButton] {
-                --ig-size: 2;
-            }
         }
     }