NPE on org.springframework.boot.SpringApplication.getMainApplicationClass() with AOT

Hi!
I'm trying to implement AOT into a simple java lambda

I'm using the `com.amazonaws.serverless.proxy.spring.SpringDelegatingLambdaContainerHandler` handler

## Dependencies:
```xml

org.springframework.boot
spring-boot-starter
3.5.7

com.amazonaws.serverless
aws-serverless-java-container-springboot3
2.1.5

```

## Logs:
```
Picked up JAVA_TOOL_OPTIONS: -Dspring.aot.enabled=true
Picked up _JAVA_OPTIONS: -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,quiet=y,address=*:5005 -XX:MaxHeapSize=2834432k -XX:+UseSerialGC -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -Djava.net.preferIPv4Stack=true
11:25:50.498 [main] INFO org.springframework.cloud.function.serverless.web.FunctionClassUtils -- Main class: class org.example.IssueApplication
11:25:50.520 [main] INFO com.amazonaws.serverless.proxy.AsyncInitializationWrapper -- Async initialization will wait for 5775ms (init grace time is configured to 150)
11:25:50.522 [Thread-0] INFO com.amazonaws.serverless.proxy.AsyncInitializationWrapper -- Starting async initializer
11:25:50.550 [Thread-1] INFO org.springframework.cloud.function.serverless.web.ServerlessMVC -- Starting application with the following configuration classes:
11:25:50.551 [Thread-1] INFO org.springframework.cloud.function.serverless.web.ServerlessMVC -- IssueApplication
11:28:37.898 [Thread-1] ERROR org.springframework.boot.SpringApplication -- Application run failed
java.lang.NullPointerException: Cannot invoke "java.lang.Class.getName()" because the return value of "org.springframework.boot.SpringApplication.getMainApplicationClass()" is null
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.addAotGeneratedEnvironmentPostProcessorIfNecessary(EnvironmentPostProcessorApplicationListener.java:160)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:130)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:115)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
at java.base/java.lang.Iterable.forEach(Unknown Source)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
at org.springframework.cloud.function.serverless.web.ServerlessMVC.initContext(ServerlessMVC.java:125)
at org.springframework.cloud.function.serverless.web.ServerlessMVC.lambda$initializeContextAsync$1(ServerlessMVC.java:112)
at java.base/java.lang.Thread.run(Unknown Source)
11:28:37.900 [Thread-1] INFO org.springframework.cloud.function.serverless.web.ServerlessMVC -- Application is started successfully.
Exception in thread "Thread-1" java.lang.IllegalStateException: java.lang.NullPointerException: Cannot invoke "java.lang.Class.getName()" because the return value of "org.springframework.boot.SpringApplication.getMainApplicationClass()" is null
at org.springframework.cloud.function.serverless.web.ServerlessMVC.lambda$initializeContextAsync$1(ServerlessMVC.java:115)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Class.getName()" because the return value of "org.springframework.boot.SpringApplication.getMainApplicationClass()" is null
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.addAotGeneratedEnvironmentPostProcessorIfNecessary(EnvironmentPostProcessorApplicationListener.java:160)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:130)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:115)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
at java.base/java.lang.Iterable.forEach(Unknown Source)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
at org.springframework.cloud.function.serverless.web.ServerlessMVC.initContext(ServerlessMVC.java:125)
at org.springframework.cloud.function.serverless.web.ServerlessMVC.lambda$initializeContextAsync$1(ServerlessMVC.java:112)
... 1 more
Cannot invoke "org.springframework.web.servlet.DispatcherServlet.getServletContext()" because "this.dispatcher" is null: java.lang.NullPointerException
java.lang.NullPointerException: Cannot invoke "org.springframework.web.servlet.DispatcherServlet.getServletContext()" because "this.dispatcher" is null
at org.springframework.cloud.function.serverless.web.ServerlessMVC.getServletContext(ServerlessMVC.java:138)
at com.amazonaws.serverless.proxy.spring.SpringDelegatingLambdaContainerHandler.handleRequest(SpringDelegatingLambdaContainerHandler.java:68)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)

END RequestId: 8baa5a53-ca92-4fd0-bc7e-b3720868d264
REPORT RequestId: 8baa5a53-ca92-4fd0-bc7e-b3720868d264 Init Duration: 0.02 ms Duration: 171628.48 ms Billed Duration: 171629 ms Memory Size: 4096 MB Max Memory Used: 4096 MB
```

Tái hiện quá trình khởi động AOT Lambda bằng SpringDelegatingLambdaContainerHandler và các phiên bản dependency được hiển thị. Bắt đầu từ SpringApplication.getMainApplicationClass() và EnvironmentPostProcessorApplicationListener.addAotGeneratedEnvironmentPostProcessorIfNecessary, sau đó lần theo đường dẫn khởi tạo của ServerlessMVC. Hoàn tất khi ứng dụng khởi động mà không gặp NPE đã được báo cáo hoặc lỗi dispatcher xảy ra sau đó.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.