When testing with Gradle 7.6, junit-platform-launcher won't be
on the test runtime classpath unless it's declared as a dependency.
When testing with Gradle 8.x the dependency is added implicitly but
starting with Gradle 8.3 relying on this will result in a warning.
When junit-platform-launcher is absent, a failure occurs when testing
with Gradle as the class loader structure is such that JUnit tries
to load any test execution listeners, finds the listener declared in
spring-boot-actuator-autoconfigure but cannot then load the
implemented TestExecutionListener interface.
This problem is addressed by augmenting the component metadata for
spring-boot-starter-test to add a dependency on
junit-platform-launcher. This addresses the problem with
spring-boot-actuator-autoconfigure while also addressing a warning
with Gradle 8.3+.
Closes gh-43340
86818b0e45