Add jruby JAR path to the plugins Snyk scanning pipeline. (#18912)

* Add jruby JAR path to the plugins Snyk scanning which required by some of (e.g. dissect) plugins.

* Make plugin snyk scanning noop for now.

* Disable plugins snyk scanning pipeline schedule

Author: mashhurs

.buildkite/scripts/snyk/plugins-scan/generate-steps.py

@@ -136,6 +136,7 @@ def generate_snyk_step(plugin_name: str, branch: str, logstash_branch: str = Non
 
 # Export Gradle property for plugins that need logstashCoreGemPath
 export ORG_GRADLE_PROJECT_logstashCoreGemPath="{work_dir}/logstash/logstash-core"
+export ORG_GRADLE_PROJECT_logstashJRubyVendorPath="{work_dir}/{plugin_name}/vendor/jruby/lib/jruby.jar"
 """
 
     command = f"""#!/bin/bash

catalog-info.yaml

@@ -167,11 +167,11 @@ spec:
           access_level: MANAGE_BUILD_AND_READ
         everyone:
           access_level: READ_ONLY
-      schedules:
-        Daily Plugins Snyk scan:
-          branch: main
-          cronline: "@daily"
-          message: "Run the Logstash Plugins Snyk report every day."
+      #schedules:
+      #  Daily Plugins Snyk scan:
+      #    branch: main
+      #    cronline: "@daily"
+      #    message: "Run the Logstash Plugins Snyk report every day."
 
 # ***********************************
 # Declare artifacts-snyk-report pipeline