Optimize the process of following someone (#9220)

* Eliminate extra accounts select query from FollowService

* Optimistically update follow state in web UI and hide loading bar

Fix #6205

* Asynchronize NotifyService in FollowService

And fix failing test

* Skip Webfinger resolve routine when called from FollowService if possible

If an account is ActivityPub, then webfinger re-resolving is not necessary
when called from FollowService. Improve options of ResolveAccountService

app/controllers/api/v1/accounts_controller.rb

@@ -17,7 +17,7 @@ class Api::V1::AccountsController < Api::BaseController
   end
 
   def follow
-    FollowService.new.call(current_user.account, @account.acct, reblogs: truthy_param?(:reblogs))
+    FollowService.new.call(current_user.account, @account, reblogs: truthy_param?(:reblogs))
 
     options = @account.locked? ? {} : { following_map: { @account.id => { reblogs: truthy_param?(:reblogs) } }, requested_map: { @account.id => false } }