IntelliJ IDEA can't find generated configuration metadata file

Question

In my project I'm using the spring-boot-configuration-processor to generate configuration metadata, which can be helpful at setting fields in @ConfigurationProperties-marked classes from .properties files. As a build system I use Gradle.

The configuration looks like this:

@Configuration
@ConfigurationProperties(prefix = "user-config")
public class UserSettings {
    /**
     * User name.
     */
    private String name;
   
    // getters & setters
}

And I import spring-boot-configuration-processor dependency in Gradle like this:

annotationProcessor group: 'org.springframework.boot', name: 'spring-boot-configuration-processor'

The problem is that IntelliJ IDEA can't find the generated spring-configuration-metadata.json file, which lies in /build/classes/java/main/META-INF.

I did some research and found out that IDEA uses out/production/classes path for production output, while Gradle uses build/classes/java/main.

Then I came to this SO question, where I found a solution: https://stackoverflow.com/a/55516113/8521177. As pointed there, there are two solutions:

1. Configure the Spring Boot Annotation Processor manually in IDEA (which is unacceptable, because it would force everyone who works in the project to do so)
2. Set IDEA output path to the same one as Gradle path as pointed in this answer: https://stackoverflow.com/a/46420842/8521177. Then IDEA will find the generated spring-configuration-metadata.json metadata file.

And another solution is to put generated file in src/main/resources/META-INF manually and deploy the app with the file in this folder.

The second solution worked out, but then in the same answer I found this comment - Intellij - set default output path to gradle output, which states that gradle idea is obsolete and one should use the 'delegate' option in IDEA. I turned this option on, and now IDEA produces output in the same folder as Gradle does, but once again IDEA can't find the generated metadata file, since output path is set to out/ again.

So, what's the proper solution to make IDEA recognize this generated file?

UPD: I use IntelliJ IDEA 2019.1.3 (Ultimate Edition), Gradle 5.4.1, Spring Boot 2.1.5.