Add build-info.properties to spring boot smoke test image (#9521)

Author: laurit

smoke-tests/images/spring-boot/build.gradle.kts

@@ -37,6 +37,11 @@ java {
   targetCompatibility = JavaVersion.VERSION_1_8
 }
 
+springBoot {
+  buildInfo {
+  }
+}
+
 jib {
   from.image = "openjdk:$targetJDK"
   to.image = "ghcr.io/open-telemetry/opentelemetry-java-instrumentation/smoke-test-spring-boot:jdk$targetJDK-$tag"