Migrate 'Obtaining a thread dump' page from wiki to docs site

[getJv]

Essential information

Page to Migrate: https://wiki.jenkins.io/display/JENKINS/Obtaining+a+thread+dump Update the content and migrate it to a new page under destination: https://www.jenkins.io/doc/book/system-administration/

Terminology updates

Please consider updating some old terminologies:

• Change ‘master’ to ‘controller’
• Change ‘slave’ to ‘agent’
• Change ‘blacklist’ to ‘denylist’ or better phrase in context
• Change ‘whitelist’ to ‘allowlist’ or better phrase in context

Migration tutorial

Watch the tutorial to learn more about each page migration process:

Additional information

It should be improved on and cleaned up, not just imported,

You can use the wiki-exporter to save some time: https://jenkins-wiki-exporter.jenkins.io/

Redirecting pages

Redirect by sending a PR to this file: https://github.com/jenkins-infra/jenkins-infra/blob/staging/dist/profile/templates/confluence/vhost.conf, see past PRs for examples.