GH-3379: Spring Boot 4.x compatibility #4774
                
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This PR migrates Spring AI framework to Spring Boot 4.0.0.RC1
Depending on Spring AI release schedule and planning it should probably be targeted to 2.x dedicated branch (or dedicated 1.1.x branch should be created) since it will break compatibility with Spring Boot 3.5
FailureDetectingExternalResourcefrom old versions oftestcontainerslibrary to supportgemfire-testcontainersFixes GH-3379 (#3379)
Includes changes from #4681
Built on-top of #4771
*Apiclasses inmodelsmodules to simplify extensibility; effective final fields are marked as finalFuture tasks:
swagger-codegen-maven-pluginto support Spring Framework 7