Review fixes - add indexes for JiHu version

db/post_migrate/20240507161859_add_trigram_index_on_public_email_for_users.rb

@@ -8,7 +8,7 @@ class AddTrigramIndexOnPublicEmailForUsers < Gitlab::Database::Migration[2.2]
   INDEX_NAME = 'index_users_on_public_email_trigram'
 
   def up
-    return if Gitlab.com?
+    return if Gitlab.com_except_jh?
 
     # rubocop:disable Migration/PreventIndexCreation -- index for self-managed instance
     add_concurrent_index :users, :public_email, name: INDEX_NAME, using: :gin, opclass: { public_email: :gin_trgm_ops }
@@ -16,7 +16,7 @@ def up
   end
 
   def down
-    return if Gitlab.com?
+    return if Gitlab.com_except_jh?
 
     remove_concurrent_index_by_name :users, INDEX_NAME
   end

db/post_migrate/20240507162033_add_trigram_index_on_email_for_users.rb

@@ -8,7 +8,7 @@ class AddTrigramIndexOnEmailForUsers < Gitlab::Database::Migration[2.2]
   INDEX_NAME = 'index_users_on_email_trigram'
 
   def up
-    return if Gitlab.com?
+    return if Gitlab.com_except_jh?
 
     # rubocop:disable Migration/PreventIndexCreation -- index for self-managed instance
     add_concurrent_index :users, :email, name: INDEX_NAME, using: :gin, opclass: { email: :gin_trgm_ops }
@@ -16,7 +16,7 @@ def up
   end
 
   def down
-    return if Gitlab.com?
+    return if Gitlab.com_except_jh?
 
     remove_concurrent_index_by_name :users, INDEX_NAME
   end

db/post_migrate/20240507162310_add_trigram_index_on_email_for_emails.rb

@@ -8,13 +8,13 @@ class AddTrigramIndexOnEmailForEmails < Gitlab::Database::Migration[2.2]
   INDEX_NAME = 'index_emails_on_email_trigram'
 
   def up
-    return if Gitlab.com?
+    return if Gitlab.com_except_jh?
 
     add_concurrent_index :emails, :email, name: INDEX_NAME, using: :gin, opclass: { email: :gin_trgm_ops }
   end
 
   def down
-    return if Gitlab.com?
+    return if Gitlab.com_except_jh?
 
     remove_concurrent_index_by_name :emails, INDEX_NAME
   end