[DOCS] Delete pipeline containing stored script (#83102) (#83105)

Adds a hidden snippet to delete the pipeline containing a stored script for cleanup.

Relates to #83097.

(cherry picked from commit eda391a)

Author: jrodewig

docs/reference/ingest.asciidoc

@@ -885,6 +885,7 @@ PUT _ingest/pipeline/my-pipeline
 [source,console]
 ----
 DELETE _scripts/my-prod-tag-script
+DELETE _ingest/pipeline/my-pipeline
 ----
 // TEST[continued]
 ////