Docs: Remove feature folder (#27830)

* moved files out of tutorials folder

* link update

* updated weights

* moved Explore

* move files and fix links

* moved files out of features

* Revert "moved files out of features"

This reverts commit 5e44cbcc95.

* fixed links

docs/sources/tutorials/_index.md

@@ -1,23 +0,0 @@
-+++
-title = "Tutorials"
-type = "docs"
-[menu.docs]
-identifier = "tutorials"
-weight = 6
-+++
-
-# Tutorials
-
-This section of the docs contains a series for tutorials and stack setup guides.
-
-## Articles
-
-- [API Tutorial: How To Create API Tokens And Dashboards For A Specific Organization]({{< relref "api_org_token_howto.md" >}})
-- [How to setup Grafana for high availability]({{< relref "ha_setup.md" >}})
-
-## External links
-
-- [Installing Graphite and Grafana on RHEL 6, 7, or Ubuntu in under 30 minutes](https://www.beginswithdata.com/2015/09/14/installing-graphite-and-grafana-on-rhel-6-7-or-ubuntu-in-under-30-minutes/)
-- [Monitoring Urbancode deployments with Docker, Graphite, Grafana, collectd and chef!](http://cloud.boriskuschel.com/2015/08/monitoring-urbancode-deploments-with.html)
-- [Scripting Grafana dashboards](http://anatolijd.blogspot.se/2014/07/scripting-grafana-dashboards.html)
-