Make sure @DataR2dbcTest invokes database migration if necessary

Closes gh-20739

Author: snicoll

spring-boot-project/spring-boot-test-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -50,6 +50,8 @@ org.springframework.boot.test.autoconfigure.data.r2dbc.AutoConfigureDataR2dbc=\
 org.springframework.boot.autoconfigure.data.r2dbc.R2dbcRepositoriesAutoConfiguration,\
 org.springframework.boot.autoconfigure.data.r2dbc.R2dbcTransactionManagerAutoConfiguration,\
 org.springframework.boot.autoconfigure.data.r2dbc.R2dbcDataAutoConfiguration,\
+org.springframework.boot.autoconfigure.flyway.FlywayAutoConfiguration,\
+org.springframework.boot.autoconfigure.liquibase.LiquibaseAutoConfiguration,\
 org.springframework.boot.autoconfigure.r2dbc.R2dbcAutoConfiguration,\
 org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration