fix(ivy): missing first argument in elementStyling instruction inside hostBindings section (#27404)

The logic that generates first argument for the `elementStyling` instruction was missing the check that directive expression is specified. As a result, in some cases first argument was not added, thus making function invocation incorrect. Now the presence of directive expression is taken into account and the `null` expression is generated as needed.

PR Close #27404

packages/compiler/src/render3/view/styling.ts

@@ -205,7 +205,7 @@ export class StylingBuilder {
         // can be processed during runtime. These initial class values are bound to
         // a constant because the inital class values do not change (since they're static).
         params.push(constantPool.getConstLiteral(initialClasses, true));
-      } else if (initialStyles || useSanitizer) {
+      } else if (initialStyles || useSanitizer || this._directiveExpr) {
         // no point in having an extra `null` value unless there are follow-up params
         params.push(o.NULL_EXPR);
       }