Feature/fix aot compilation

[bedrin]

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Fixed Spring AOT support and regression issue introduced in GH-4751

PR https://github.com/spring-projects/spring-ai/pull/4751/ introduced a new error when using Spring AOT:

Exception in thread "main" org.springframework.beans.factory.aot.AotBeanProcessingException: Error processing bean with name 'org.springframework.ai.model.tool.autoconfigure.ToolCallingAutoConfiguration.toolcallbackprovider.mcp-excluded': instance supplier is not supported
        at org.springframework.beans.factory.aot.DefaultBeanRegistrationCodeFragments.getTarget(DefaultBeanRegistrationCodeFragments.java:82)
        at org.springframework.beans.factory.aot.BeanDefinitionMethodGenerator.generateBeanDefinitionMethod(BeanDefinitionMethodGenerator.java:85)
        at org.springframework.beans.factory.aot.BeanRegistrationsAotContribution$BeanDefinitionsRegistrationGenerator.generateBeanRegistration(BeanRegistrationsAotContribution.java:289)
        at org.springframework.beans.factory.aot.BeanRegistrationsAotContribution$BeanDefinitionsRegistrationGenerator.lambda$generateRegisterBeanDefinitionMethods$0(BeanRegistrationsAotContribution.java:272)
        at java.base/java.lang.Iterable.forEach(Iterable.java:75)
        at org.springframework.beans.factory.aot.BeanRegistrationsAotContribution$BeanDefinitionsRegistrationGenerator.generateRegisterBeanDefinitionMethods(BeanRegistrationsAotContribution.java:270)
        at org.springframework.beans.factory.aot.BeanRegistrationsAotContribution$BeanDefinitionsRegistrationGenerator.generateBeanRegistrationsCode(BeanRegistrationsAotContribution.java:238)
        at org.springframework.beans.factory.aot.BeanRegistrationsAotContribution.lambda$generateBeanRegistrationClass$0(BeanRegistrationsAotContribution.java:116)

This PR fixes this issue by refactoring ToolCallingAutoConfiguration from using BeanDefinitionRegistryPostProcessor to ObjectProvider

Also added a step to test it to avoid regression in future