[ML] Update last usages of model_id to inference_id (#107133)

Author: davidkyle

docs/reference/inference/put-inference.asciidoc

@@ -18,7 +18,7 @@ or if you want to use non-NLP models, use the <<ml-df-trained-models-apis>>.
 [[put-inference-api-request]]
 ==== {api-request-title}
 
-`PUT /_inference/<task_type>/<model_id>`
+`PUT /_inference/<task_type>/<inference_id>`
 
 
 [discrete]

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/inference/action/PutInferenceModelAction.java

@@ -86,7 +86,7 @@ public void writeTo(StreamOutput out) throws IOException {
         public ActionRequestValidationException validate() {
             ActionRequestValidationException validationException = new ActionRequestValidationException();
             if (MlStrings.isValidId(this.inferenceEntityId) == false) {
-                validationException.addValidationError(Messages.getMessage(Messages.INVALID_ID, "model_id", this.inferenceEntityId));
+                validationException.addValidationError(Messages.getMessage(Messages.INVALID_ID, "inference_id", this.inferenceEntityId));
             }
 
             if (validationException.validationErrors().isEmpty() == false) {