Add terminate ingest processor

Author: PeteGillinElastic

specification/ingest/_types/Processors.ts

@@ -230,6 +230,12 @@ export class ProcessorContainer {
    * @doc_id split-processor
    */
   split?: SplitProcessor
+  /**
+   * Terminates the current ingest pipeline, causing no further processors to be run.
+   * This will normally be executed conditionally, using the `if` option.
+   * @doc_id terminate-processor
+   */
+  terminate?: TerminateProcessor
   /**
    * Trims whitespace from a field.
    * If the field is an array of strings, all members of the array will be trimmed.
@@ -1279,6 +1285,9 @@ export class SplitProcessor extends ProcessorBase {
   target_field?: Field
 }
 
+export class TerminateProcessor extends ProcessorBase {
+}
+
 export class TrimProcessor extends ProcessorBase {
   /**
    * The string-valued field to trim whitespace from.