Monaco: add suggestions for template variables (#25921)

* now with suggestions

* using suggestions API

* using variable suggestions

* using variable suggestions

* show variables

* minor cleanup

* add @alpha warning

* Do not produce data variables if panel does not support queries

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

scripts/webpack/webpack.common.js

@@ -80,7 +80,7 @@ module.exports = {
         '!cursorUndo',
         '!dnd',
         '!find',
-        '!folding',
+        'folding',
         '!fontZoom',
         '!format',
         '!gotoError',
@@ -93,14 +93,14 @@ module.exports = {
         '!linesOperations',
         '!links',
         '!multicursor',
-        '!parameterHints',
+        'parameterHints',
         '!quickCommand',
         '!quickOutline',
         '!referenceSearch',
         '!rename',
         '!smartSelect',
         '!snippets',
-        '!suggest',
+        'suggest',
         '!toggleHighContrast',
         '!toggleTabFocusMode',
         '!transpose',