tryGetFetchGraphHints has been removed

[lol768]

spring-projects/spring-data-jpa@4b7f9e9#diff-0351078d8920625dbe4e487ae2e380aaed6bc7b14d306d2ccff88a7e142fb8c5

Subsequently this fails w/ Spring Boot 2.4.0:

java.lang.NoSuchMethodError: 'java.util.Map org.springframework.data.jpa.repository.query.Jpa21Utils.tryGetFetchGraphHints(javax.persistence.EntityManager, org.springframework.data.jpa.repository.query.JpaEntityGraph, java.lang.Class)'