introduce jenkins prepackaged v1.0.0 (#11881)

* introduce jenkins prepackaged v1.0.0

* remove debug files

* fix gofmt

Makefile

@@ -89,6 +89,7 @@ PLUGIN_PACKAGES += mattermost-plugin-aws-SNS-v1.0.2
 PLUGIN_PACKAGES += mattermost-plugin-antivirus-v0.1.1
 PLUGIN_PACKAGES += mattermost-plugin-jira-v2.1.0
 PLUGIN_PACKAGES += mattermost-plugin-gitlab-v1.0.0
+PLUGIN_PACKAGES += mattermost-plugin-jenkins-v1.0.0
 
 # Prepares the enterprise build if exists. The IGNORE stuff is a hack to get the Makefile to execute the commands outside a target
 ifeq ($(BUILD_ENTERPRISE_READY),true)