Add Delete Sample Configuration action (elastic#136570)

* Add Delete Sample Configuration action

---------

Co-authored-by: Copilot <[email protected]>

Author: 2 people

rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_sample_configuration.json

@@ -0,0 +1,45 @@
+{
+  "indices.delete_sample_configuration": {
+    "documentation": {
+      "url": "https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-indices-delete-sample-configuration",
+      "description": "Delete sampling configuration for an index or data stream"
+    },
+    "stability": "experimental",
+    "visibility": "public",
+    "headers": {
+      "accept": [
+        "application/json"
+      ],
+      "content_type": [
+        "application/json"
+      ]
+    },
+    "url": {
+      "paths": [
+        {
+          "path": "/{index}/_sample/config",
+          "methods": [
+            "DELETE"
+          ],
+          "parts": {
+            "index": {
+              "type": "string",
+              "description": "The name of a data stream or index"
+            }
+          }
+        }
+      ]
+    },
+    "params": {
+      "master_timeout": {
+        "type": "time",
+        "description": "Timeout for connection to master node"
+      },
+      "timeout": {
+        "type": "time",
+        "description": "Timeout for the request"
+      }
+    }
+  }
+}
+

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/indices.delete_sample_configuration/10_basic.yml

@@ -0,0 +1,198 @@
+---
+setup:
+  - requires:
+      cluster_features: [ "random_sampling" ]
+      reason: requires feature 'random_sampling' to delete random samples
+
+---
+teardown:
+  - do:
+      indices.delete:
+        index: "*test*"
+        ignore_unavailable: true
+        allow_no_indices: true
+
+---
+"Test Delete existing sampling configuration":
+  - do:
+      indices.create:
+        index: test-delete-index
+        body:
+          settings:
+            number_of_shards: 1
+
+  # First create a sampling configuration
+  - do:
+      indices.put_sample_configuration:
+        index: test-delete-index
+        body:
+          rate: 0.5
+          max_samples: 100
+          max_size: "10mb"
+          time_to_live: "1h"
+
+  - match: { acknowledged: true }
+
+  # Now delete the sampling configuration
+  - do:
+      indices.delete_sample_configuration:
+        index: test-delete-index
+
+  - match: { acknowledged: true }
+
+---
+"Delete sampling configuration for non-existent index":
+  - do:
+      catch: missing
+      indices.delete_sample_configuration:
+        index: non-existent-index
+
+---
+"Delete non-existent sampling configuration":
+  - do:
+      indices.create:
+        index: test-no-config-index
+
+  # Try to delete configuration that doesn't exist
+  - do:
+      catch: missing
+      indices.delete_sample_configuration:
+        index: test-no-config-index
+
+---
+"Delete sampling configuration with custom timeouts":
+  - do:
+      indices.create:
+        index: test-timeout-index
+
+  # Create a sampling configuration
+  - do:
+      indices.put_sample_configuration:
+        index: test-timeout-index
+        body:
+          rate: 0.3
+          max_samples: 50
+
+  - match: { acknowledged: true }
+
+  # Delete with custom timeouts
+  - do:
+      indices.delete_sample_configuration:
+        index: test-timeout-index
+        master_timeout: "2m"
+        timeout: "45s"
+
+  - match: { acknowledged: true }
+
+---
+"Delete one configuration leaves others intact":
+  - do:
+      indices.create:
+        index: test-multi-index-1
+
+  - do:
+      indices.create:
+        index: test-multi-index-2
+
+  # Create sampling configurations for both indices
+  - do:
+      indices.put_sample_configuration:
+        index: test-multi-index-1
+        body:
+          rate: 0.4
+          max_samples: 40
+
+  - match: { acknowledged: true }
+
+  - do:
+      indices.put_sample_configuration:
+        index: test-multi-index-2
+        body:
+          rate: 0.6
+          max_samples: 60
+
+  - match: { acknowledged: true }
+
+  # Delete configuration for first index only
+  - do:
+      indices.delete_sample_configuration:
+        index: test-multi-index-1
+
+  - match: { acknowledged: true }
+
+  # Verify second index configuration still exists by trying to delete it
+  - do:
+      indices.delete_sample_configuration:
+        index: test-multi-index-2
+
+  - match: { acknowledged: true }
+
+---
+"Delete then attempt to delete again":
+  - do:
+      indices.create:
+        index: test-double-delete-index
+
+  # Create configuration
+  - do:
+      indices.put_sample_configuration:
+        index: test-double-delete-index
+        body:
+          rate: 0.7
+          max_samples: 70
+
+  - match: { acknowledged: true }
+
+  # First delete should succeed
+  - do:
+      indices.delete_sample_configuration:
+        index: test-double-delete-index
+
+  - match: { acknowledged: true }
+
+  # Second delete should fail
+  - do:
+      catch: missing
+      indices.delete_sample_configuration:
+        index: test-double-delete-index
+
+---
+"Delete and recreate workflow":
+  - do:
+      indices.create:
+        index: test-recreate-index
+
+  # Create initial configuration
+  - do:
+      indices.put_sample_configuration:
+        index: test-recreate-index
+        body:
+          rate: 0.2
+          max_samples: 20
+
+  - match: { acknowledged: true }
+
+  # Delete the configuration
+  - do:
+      indices.delete_sample_configuration:
+        index: test-recreate-index
+
+  - match: { acknowledged: true }
+
+  # Recreate with different configuration
+  - do:
+      indices.put_sample_configuration:
+        index: test-recreate-index
+        body:
+          rate: 0.9
+          max_samples: 90
+          max_size: "20mb"
+
+  - match: { acknowledged: true }
+
+  # Delete the new configuration
+  - do:
+      indices.delete_sample_configuration:
+        index: test-recreate-index
+
+  - match: { acknowledged: true }