[v10.1.x] Remove plugins (#75585)

* Delete plugins files comprehensively

* [publish-technical-documentation-release] Publish from grafana/grafana:v10.1.x/docs/sources

* Cleanup whitespace

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* [publish-technical-documentation-next] Publish from grafana/beyla:main/docs/sources

* Fix all links to "Sign a plugin" pages

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* [publish_dashboards]

* Fix metadata links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* [publish-technical-documentation-next] Publish from grafana/agent:main/docs/sources

* Fix data-frames redirect

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* add collapse shortcode (#15422)

* Add note about missing rewrites

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix all data-frames links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix links to "plugins"

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix links to angular-react

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix "plugin-sdk-go" links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix backend links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix "Add query editor help" links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix some remaining links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Fix some stray links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* [publish_plugins]

* Add missing redirects and fix a couple more links

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

* Use partial URLs to appease `doc-validator` for now

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

---------

Signed-off-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/developers/angular_deprecation/_index.md

@@ -40,7 +40,7 @@ We encourage you to locate the repository of the corresponding plugin and create
 
 ### Links
 
-- [Migrate Angular to React]({{< relref "../plugins/migration-guide/angular-react/" >}})
+- [Migrate Angular to React](/developers/plugin-tools/migration-guides/migrate-angularjs-to-react)
 - [Build a panel plugin](https://grafana.com/tutorials/build-a-panel-plugin/)
 - [Build a data source plugin](https://grafana.com/tutorials/build-a-data-source-plugin/)
 - [List of current Angular plugins]({{< relref "./angular-plugins/" >}})