Fix personal access token policy spec

We use `build_stubbed` so that the user associations have IDs because in
the policy, we do some ID comparison to determine if the user is the
owner of the token.

We had to use `create` for the blocked user case because the factory
calls `User#block!` which saves the update to the DB and that does not
work with stubbed models.

spec/policies/personal_access_token_policy_spec.rb

@@ -8,17 +8,17 @@ RSpec.describe PersonalAccessTokenPolicy do
   subject { described_class.new(current_user, token) }
 
   context 'current_user is an administrator', :enable_admin_mode do
-    let_it_be(:current_user) { build(:admin) }
+    let_it_be(:current_user) { build_stubbed(:admin) }
 
     context 'not the owner of the token' do
-      let_it_be(:token) { build(:personal_access_token) }
+      let_it_be(:token) { build_stubbed(:personal_access_token) }
 
       it { is_expected.to be_allowed(:read_token) }
       it { is_expected.to be_allowed(:revoke_token) }
     end
 
     context 'owner of the token' do
-      let_it_be(:token) { build(:personal_access_token, user: current_user) }
+      let_it_be(:token) { build_stubbed(:personal_access_token, user: current_user) }
 
       it { is_expected.to be_allowed(:read_token) }
       it { is_expected.to be_allowed(:revoke_token) }
@@ -26,17 +26,17 @@ RSpec.describe PersonalAccessTokenPolicy do
   end
 
   context 'current_user is not an administrator' do
-    let_it_be(:current_user) { build(:user) }
+    let_it_be(:current_user) { build_stubbed(:user) }
 
     context 'not the owner of the token' do
-      let_it_be(:token) { build(:personal_access_token) }
+      let_it_be(:token) { build_stubbed(:personal_access_token) }
 
       it { is_expected.to be_disallowed(:read_token) }
       it { is_expected.to be_disallowed(:revoke_token) }
     end
 
     context 'owner of the token' do
-      let_it_be(:token) { build(:personal_access_token, user: current_user) }
+      let_it_be(:token) { build_stubbed(:personal_access_token, user: current_user) }
 
       it { is_expected.to be_allowed(:read_token) }
       it { is_expected.to be_allowed(:revoke_token) }
@@ -44,17 +44,17 @@ RSpec.describe PersonalAccessTokenPolicy do
   end
 
   context 'current_user is a blocked administrator', :enable_admin_mode do
-    let_it_be(:current_user) { build(:admin, :blocked) }
+    let_it_be(:current_user) { create(:admin, :blocked) }
 
     context 'owner of the token' do
-      let_it_be(:token) { build(:personal_access_token, user: current_user) }
+      let_it_be(:token) { build_stubbed(:personal_access_token, user: current_user) }
 
       it { is_expected.to be_disallowed(:read_token) }
       it { is_expected.to be_disallowed(:revoke_token) }
     end
 
     context 'not the owner of the token' do
-      let_it_be(:token) { build(:personal_access_token) }
+      let_it_be(:token) { build_stubbed(:personal_access_token) }
 
       it { is_expected.to be_disallowed(:read_token) }
       it { is_expected.to be_disallowed(:revoke_token) }