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
```

Reproduce the AOT Lambda startup using SpringDelegatingLambdaContainerHandler and the dependency versions shown. Start at SpringApplication.getMainApplicationClass() and EnvironmentPostProcessorApplicationListener.addAotGeneratedEnvironmentPostProcessorIfNecessary, then trace the ServerlessMVC initialization path. Done means the application starts without the reported NPE or subsequent dispatcher failure.

Written by the indexing model from the issue text.