loki: better unpack handling (#49074)

public/app/plugins/datasource/loki/syntax.ts

@@ -72,6 +72,13 @@ export const PIPE_PARSERS: CompletionItem[] = [
     insertText: 'pattern',
     documentation: 'Extracting labels from the log line using pattern parser. Only available in Loki 2.3+.',
   },
+  {
+    label: 'unpack',
+    insertText: 'unpack',
+    detail: 'unpack identifier',
+    documentation:
+      'Parses a JSON log line, unpacking all embedded labels in the pack stage. A special property "_entry" will also be used to replace the original log line. Only available in Loki 2.2+.',
+  },
 ];
 
 export const PIPE_OPERATORS: CompletionItem[] = [
@@ -82,13 +89,6 @@ export const PIPE_OPERATORS: CompletionItem[] = [
     documentation:
       'Take labels and use the values as sample data for metric aggregations. Only available in Loki 2.0+.',
   },
-  {
-    label: 'unpack',
-    insertText: 'unpack',
-    detail: 'unpack identifier',
-    documentation:
-      'Parses a JSON log line, unpacking all embedded labels in the pack stage. A special property "_entry" will also be used to replace the original log line. Only available in Loki 2.0+.',
-  },
   {
     label: 'label_format',
     insertText: 'label_format',