Fix edge case where accepted follow cannot be processed because of follow limit (#16098)

app/models/follow_request.rb

@@ -29,7 +29,7 @@ class FollowRequest < ApplicationRecord
   validates :account_id, uniqueness: { scope: :target_account_id }
 
   def authorize!
-    account.follow!(target_account, reblogs: show_reblogs, notify: notify, uri: uri)
+    account.follow!(target_account, reblogs: show_reblogs, notify: notify, uri: uri, bypass_limit: true)
     MergeWorker.perform_async(target_account.id, account.id) if account.local?
     destroy!
   end

spec/models/follow_request_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe FollowRequest, type: :model do
     let(:target_account) { Fabricate(:account) }
 
     it 'calls Account#follow!, MergeWorker.perform_async, and #destroy!' do
-      expect(account).to        receive(:follow!).with(target_account, reblogs: true, notify: false, uri: follow_request.uri)
+      expect(account).to        receive(:follow!).with(target_account, reblogs: true, notify: false, uri: follow_request.uri, bypass_limit: true)
       expect(MergeWorker).to    receive(:perform_async).with(target_account.id, account.id)
       expect(follow_request).to receive(:destroy!)
       follow_request.authorize!