fix(ivy): avoid generating instructions for empty style and class bindings (#30024)

Fixes Ivy throwing an error because it tries to generate styling instructions for empty `style` and `class` bindings.

This PR resolves FW-1274.

PR Close #30024

packages/compiler/src/template_parser/template_parser.ts

@@ -899,7 +899,7 @@ export function removeSummaryDuplicates<T extends{type: CompileTypeMetadata}>(it
   return Array.from(map.values());
 }
 
-function isEmptyExpression(ast: AST): boolean {
+export function isEmptyExpression(ast: AST): boolean {
   if (ast instanceof ASTWithSource) {
     ast = ast.ast;
   }