Add slf4j-simple to the shaded jar (open-telemetry#2120)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: atoulme

ibm-mq-metrics/build.gradle.kts

@@ -39,6 +39,7 @@ dependencies {
   api("io.opentelemetry:opentelemetry-exporter-otlp")
   api("io.opentelemetry:opentelemetry-sdk-extension-autoconfigure")
   api("org.slf4j:slf4j-api:2.0.17")
+  implementation("org.slf4j:slf4j-simple:2.0.17")
   testImplementation("com.google.guava:guava")
   testImplementation("io.opentelemetry:opentelemetry-sdk-testing")
   integrationTestImplementation("org.assertj:assertj-core:3.27.4")