chore(editor): remove feature flag of embed doc with alias (#12620)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **New Features**
  - Toolbar actions related to embedding and duplicating documents are now always available without restrictions.

- **Chores**
  - Removed the feature flag controlling embed document alias features for a simpler user experience.

- **Tests**
  - Updated test setup to remove reliance on the deprecated feature flag.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/blocks/embed-doc/src/embed-linked-doc-block/configs/toolbar.ts

@@ -13,7 +13,6 @@ import {
   ActionPlacement,
   DocDisplayMetaProvider,
   EditorSettingProvider,
-  FeatureFlagService,
   type LinkEventType,
   type OpenDocMode,
   type ToolbarAction,
@@ -216,12 +215,7 @@ const conversionsActionGroup = {
       run(ctx) {
         const block = ctx.getCurrentBlockByType(EmbedLinkedDocBlockComponent);
 
-        if (
-          ctx.std
-            .get(FeatureFlagService)
-            .getFlag('enable_embed_doc_with_alias') &&
-          isGfxBlockComponent(block)
-        ) {
+        if (isGfxBlockComponent(block)) {
           const editorSetting = ctx.std.getOptional(EditorSettingProvider);
           editorSetting?.set?.(
             'docCanvasPreferView',

blocksuite/affine/blocks/embed-doc/src/embed-synced-doc-block/configs/toolbar.ts

@@ -17,7 +17,6 @@ import { REFERENCE_NODE } from '@blocksuite/affine-shared/consts';
 import {
   ActionPlacement,
   EditorSettingProvider,
-  FeatureFlagService,
   type LinkEventType,
   type OpenDocMode,
   type ToolbarAction,
@@ -163,12 +162,7 @@ const conversionsActionGroup = {
       label: 'Card view',
       run(ctx) {
         const block = ctx.getCurrentBlockByType(EmbedSyncedDocBlockComponent);
-        if (
-          ctx.std
-            .get(FeatureFlagService)
-            .getFlag('enable_embed_doc_with_alias') &&
-          isGfxBlockComponent(block)
-        ) {
+        if (isGfxBlockComponent(block)) {
           const editorSetting = ctx.std.getOptional(EditorSettingProvider);
           editorSetting?.set?.(
             'docCanvasPreferView',
@@ -296,8 +290,6 @@ const builtinSurfaceToolbarConfig = {
       label: 'Insert to page',
       tooltip: 'Insert to page',
       icon: InsertIntoPageIcon(),
-      when: ({ std }) =>
-        std.get(FeatureFlagService).getFlag('enable_embed_doc_with_alias'),
       run: ctx => {
         const model = ctx.getCurrentModelByType(EmbedSyncedDocModel);
         if (!model) return;
@@ -334,8 +326,6 @@ const builtinSurfaceToolbarConfig = {
       tooltip:
         'Duplicate as note to create an editable copy, the original remains unchanged.',
       icon: DuplicateIcon(),
-      when: ({ std }) =>
-        std.get(FeatureFlagService).getFlag('enable_embed_doc_with_alias'),
       run: ctx => {
         const { gfx } = ctx;