Add scrollbar fix to initEditorLite

*Why?*
- Previously you wouldn't be able to scroll
  past the file even if you're at the bottom

app/assets/javascripts/blob/utils.js

@@ -4,7 +4,11 @@ export function initEditorLite({ el, blobPath, blobContent }) {
   if (!el) {
     throw new Error(`"el" parameter is required to initialize Editor`);
   }
-  const editor = new Editor();
+  const editor = new Editor({
+    scrollbar: {
+      alwaysConsumeMouseWheel: false,
+    },
+  });
   editor.createInstance({
     el,
     blobPath,

changelogs/unreleased/217801-step-2-fix-editor-lite-scroll.yml

+---
+title: Fix scroll stuck on editor in snippets
+merge_request: 39251
+author:
+type: fixed

spec/frontend/blob/utils_spec.js

@@ -26,7 +26,11 @@ describe('Blob utilities', () => {
     describe('Monaco editor', () => {
       it('initializes the Editor Lite', () => {
         utils.initEditorLite({ el: editorEl });
-        expect(Editor).toHaveBeenCalled();
+        expect(Editor).toHaveBeenCalledWith({
+          scrollbar: {
+            alwaysConsumeMouseWheel: false,
+          },
+        });
       });
 
       it('creates the instance with the passed parameters', () => {