[docs] update ingest-node delete docs to mention wildcarding (#22270)

docs/reference/ingest/ingest-node.asciidoc

@@ -143,7 +143,7 @@ This should give a small response that makes it both easy and inexpensive to par
 [[delete-pipeline-api]]
 === Delete Pipeline API
 
-The delete pipeline API deletes pipelines by ID.
+The delete pipeline API deletes pipelines by ID or wildcard match (`my-*`, `*`).
 
 [source,js]
 --------------------------------------------------
@@ -152,6 +152,36 @@ DELETE _ingest/pipeline/my-pipeline-id
 // CONSOLE
 // TEST[continued]
 
+////
+Hidden setup for wildcard test:
+[source,js]
+--------------------------------------------------
+PUT _ingest/pipeline/wild-one
+{
+  "description" : "first pipeline to be wildcard deleted",
+  "processors" : [ ]
+}
+
+PUT _ingest/pipeline/wild-two
+{
+  "description" : "second pipeline to be wildcard deleted",
+  "processors" : [ ]
+}
+
+DELETE _ingest/pipeline/*
+--------------------------------------------------
+// CONSOLE
+
+Hidden expected response:
+[source,js]
+--------------------------------------------------
+{
+"acknowledged": true
+}
+--------------------------------------------------
+// TESTRESPONSE
+////
+
 [[simulate-pipeline-api]]
 === Simulate Pipeline API