Optimize Kotlin inline class checks

This commit fixes a performance regression caused by gh-31698,
and more specifically by KClass#isValue invocations which are slow since
they load the whole module to find the class to get the descriptor.

After discussing with the Kotlin team, it has been decided that only
checking for the presence of `@JvmInline` annotation is enough for
Spring use case.

As a consequence, this commit introduces a new
KotlinDetector#isInlineClass method that performs such check, and
BeanUtils, CoroutinesUtils and WebMVC/WebFlux InvocableHandlerMethod
have been refined to leverage it.

Closes gh-32334

spring-beans/src/main/java/org/springframework/beans/BeanUtils.java

@@ -32,11 +32,9 @@ import java.util.Map;
 import java.util.Set;
 
 import kotlin.jvm.JvmClassMappingKt;
-import kotlin.jvm.JvmInline;
 import kotlin.reflect.KClass;
 import kotlin.reflect.KFunction;
 import kotlin.reflect.KParameter;
-import kotlin.reflect.full.KAnnotatedElements;
 import kotlin.reflect.full.KClasses;
 import kotlin.reflect.jvm.KCallablesJvm;
 import kotlin.reflect.jvm.ReflectJvmMapping;
@@ -874,8 +872,7 @@ public abstract class BeanUtils {
 				if (primaryCtor == null) {
 					return null;
 				}
-				if (kClass.isValue() && !KAnnotatedElements
-						.findAnnotations(kClass, JvmClassMappingKt.getKotlinClass(JvmInline.class)).isEmpty()) {
+				if (KotlinDetector.isInlineClass(clazz)) {
 					Constructor<?>[] constructors = clazz.getDeclaredConstructors();
 					Assert.state(constructors.length == 1,
 							"Kotlin value classes annotated with @JvmInline are expected to have a single JVM constructor");