Improve exception handling in ConfigurationClassBeanDefinitionReader

Thanks to a proposal from @wilkinsona, this commit introduces a
try-catch block in loadBeanDefinitions(...) which throws an
IllegalStateException that provides context regarding the configuration
class and cause of the failure.

Closes gh-35631

Co-authored-by: Andy Wilkinson <andy.wilkinson@broadcom.com>

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassBeanDefinitionReader.java

@@ -117,7 +117,13 @@ class ConfigurationClassBeanDefinitionReader {
 	public void loadBeanDefinitions(Set<ConfigurationClass> configurationModel) {
 		TrackedConditionEvaluator trackedConditionEvaluator = new TrackedConditionEvaluator();
 		for (ConfigurationClass configClass : configurationModel) {
-			loadBeanDefinitionsForConfigurationClass(configClass, trackedConditionEvaluator);
+			try {
+				loadBeanDefinitionsForConfigurationClass(configClass, trackedConditionEvaluator);
+			}
+			catch (Exception ex) {
+				throw new IllegalStateException("Failed to load bean definitions for configuration class '" +
+						configClass.getMetadata().getClassName() + "'", ex);
+			}
 		}
 	}