MDL-75669 theme_boost: Upgrade Boostrap to v5.3

- Follow upgrade steps
- Fix some SCSS to avoid CSS compilation errors.

admin/tool/componentlibrary/hugo/scss/_colors.scss

@@ -4,14 +4,14 @@
 
 @each $color, $value in $colors {
     .swatch-#{$color} {
-        color: color-yiq($value);
+        color: color-contrast($value);
         background-color: #{$value};
     }
 }
 
 @each $color, $value in $grays {
     .swatch-#{$color} {
-        color: color-yiq($value);
+        color: color-contrast($value);
         background-color: #{$value};
     }
 }