Remove spring-boot-starter-aop dependency from spring-boot-starter-data-jpa and spring-boot-starter-integration

[philwebb]

Some performance work shows that a simple Spring Data JPA application can have improved startup time if the following exclusions are applied to spring-boot-starter-data-jpa.

<exclusions>
	<exclusion>
		<groupId>org.springframework</groupId>
		<artifactId>spring-aspects</artifactId>
	</exclusion>
	<exclusion>
		<groupId>org.aspectj</groupId>
		<artifactId>aspectjweaver</artifactId>
	</exclusion>
</exclusions>

My non scientific testing shows before:

2024-10-29T21:09:51.630-07:00  INFO 18539 --- [demo] [           main] com.example.demo.DemoApplication         : Started DemoApplication in 2.056 seconds (process running for 2.228)

after:

2024-10-29T21:10:57.554-07:00  INFO 18544 --- [demo] [           main] com.example.demo.DemoApplication         : Started DemoApplication in 1.774 seconds (process running for 1.943)

Perhaps we should change existing starters that pull in spring-boot-starter-aop to instead just pull in spring-aop.

[philwebb]

The dependency to the aot starter was added in commit d06d202. I think we can safely drop it. Users can add it back again if it causes problems.

[philwebb]

Commit 765bfbd might also be relevant. It looks like spring-aspects was added for the auditing feature.

[philwebb]

Spring Data does give a nice error message so I'm still tempted to remove the dependency.