Initial GitHub Actions workflow to test on multiple JDK versions (#2568)
Initial GitHub Actions workflow to test on multiple JDK versions (#2568)

feat(builds): Copy unit test GHA config from new repo

Co-authored-by: Travis Tomsu <a84abf9ad8bcdf860b5ba5a9422abb745190f5c9@google.com>
spring-cloud/spring-cloud-gcp,spring-cloud/spring-cloud-gcp,spring-cloud/spring-cloud-gcp,spring-cloud/spring-cloud-gcp