CAMEL-14180: use latest buildtools

Changes to the buildtools will be in effect only on the subsequent build
and only if that build successfully published artifacts to the Maven
repository.

Make need to make sure we're using the latest buildtools when performing
checks.
diff --git a/Jenkinsfile b/Jenkinsfile
index 41f1146..2c6a0ae 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -67,6 +67,7 @@
 
         stage('Checks') {
             steps {
+                sh "./mvnw $MAVEN_PARAMS -pl :camel-buildtools install"
                 sh "./mvnw $MAVEN_PARAMS -Psourcecheck -Dcheckstyle.failOnViolation=false checkstyle:check"
             }
             post {