[ES|QL] Suppress auto suggestions on tab (#290477)

## Summary

Closes #290266

The whole thing is the result of our auto trigger mechanism. I am
suppressing it in case of Tab so now the users can use tab for
indentation without the suggestions firing all the time.

Author: stratoula

src/platform/packages/private/kbn-esql-editor/src/esql_editor.tsx

@@ -904,6 +904,16 @@ const ESQLEditorInternal = function ESQLEditor({
                     onLayoutChangeRef.current(layoutInfoEvent);
                   });
 
+                  const tabKeyDisposable = editor.onKeyDown((e) => {
+                    if (
+                      e.keyCode === monaco.KeyCode.Tab &&
+                      !e.shiftKey &&
+                      !isSuggestionPopupOpenRef.current
+                    ) {
+                      suppressSuggestionsRef.current = true;
+                    }
+                  });
+
                   const modelContentDisposable = editor.onDidChangeModelContent(async () => {
                     trackInputLatencyOnKeystroke(editor.getValue() ?? '');
                     await addLookupIndicesDecorator();
@@ -917,6 +927,7 @@ const ESQLEditorInternal = function ESQLEditor({
                     mouseDownDisposable,
                     focusDisposable,
                     layoutChangeDisposable,
+                    tabKeyDisposable,
                     modelContentDisposable,
                     suggestionPopupDisposable,
                     commentLineDisposable,

src/platform/packages/private/kbn-esql-editor/src/hooks/use_editor_config.ts

@@ -229,6 +229,7 @@ export const useEditorConfig = ({
         verticalScrollbarSize: 6,
       },
       scrollBeyondLastLine: false,
+      acceptSuggestionOnTab: 'off',
       tabSize: 2,
       theme: ESQL_LANG_ID,
       wordWrap: 'on',