Add DBMTracePreparedStatements to Config().toString() (#8508)

Co-authored-by: Cecile Terpin <“cecile.terpin@datadoghq.com”>

Author: cecile75

internal-api/src/main/java/datadog/trace/api/Config.java

@@ -4407,6 +4407,8 @@ public String toString() {
         + dbClientSplitByHost
         + ", DBMPropagationMode="
         + DBMPropagationMode
+        + ", DBMTracePreparedStatements="
+        + DBMTracePreparedStatements
         + ", splitByTags="
         + splitByTags
         + ", jeeSplitByDeployment="