Reduce sandboxing to prevent swallowed deprecations

We used to sandbox everything, but it turns out that deprecations were
swallowed, as the temporary config has no deprecation stream set, or
stderr is masked.

Author: pirj

spec/rspec/rails/configuration_spec.rb

@@ -123,7 +123,7 @@
     end
   end
 
-  describe "#infer_spec_type_from_file_location!" do
+  describe "#infer_spec_type_from_file_location!", :with_isolated_config do
     def in_inferring_type_from_location_environment
       in_sub_process do
         RSpec.configuration.infer_spec_type_from_file_location!

spec/rspec/rails/example/channel_example_group_spec.rb

@@ -1,7 +1,7 @@
 require "rspec/rails/feature_check"
 
 module RSpec::Rails
-  RSpec.describe ChannelExampleGroup do
+  RSpec.describe ChannelExampleGroup, :with_isolated_config do
     if RSpec::Rails::FeatureCheck.has_action_cable_testing?
       it_behaves_like "an rspec-rails example group mixin", :channel,
                       './spec/channels/', '.\\spec\\channels\\'

spec/rspec/rails/example/controller_example_group_spec.rb

@@ -3,7 +3,7 @@ def self.abstract?; false; end
 end
 
 module RSpec::Rails
-  RSpec.describe ControllerExampleGroup do
+  RSpec.describe ControllerExampleGroup, :with_isolated_config do
     it_behaves_like "an rspec-rails example group mixin", :controller,
                     './spec/controllers/', '.\\spec\\controllers\\'
 

spec/rspec/rails/example/feature_example_group_spec.rb

@@ -1,5 +1,5 @@
 module RSpec::Rails
-  RSpec.describe FeatureExampleGroup do
+  RSpec.describe FeatureExampleGroup, :with_isolated_config do
     it_behaves_like "an rspec-rails example group mixin", :feature,
                     './spec/features/', '.\\spec\\features\\'
 

spec/rspec/rails/example/helper_example_group_spec.rb

@@ -1,5 +1,5 @@
 module RSpec::Rails
-  RSpec.describe HelperExampleGroup do
+  RSpec.describe HelperExampleGroup, :with_isolated_config do
     module ::FoosHelper
       class InternalClass
       end

spec/rspec/rails/example/job_example_group_spec.rb

@@ -1,5 +1,5 @@
 module RSpec::Rails
-  RSpec.describe JobExampleGroup do
+  RSpec.describe JobExampleGroup, :with_isolated_config do
     if defined?(ActiveJob)
       it_behaves_like "an rspec-rails example group mixin", :job,
                       './spec/jobs/', '.\\spec\\jobs\\'

spec/rspec/rails/example/mailbox_example_group_spec.rb

@@ -14,7 +14,7 @@ def receive(*)
 
 module RSpec
   module Rails
-    RSpec.describe MailboxExampleGroup, skip: !RSpec::Rails::FeatureCheck.has_action_mailbox? do
+    RSpec.describe MailboxExampleGroup, :with_isolated_config, skip: !RSpec::Rails::FeatureCheck.has_action_mailbox? do
       it_behaves_like "an rspec-rails example group mixin", :mailbox,
                       './spec/mailboxes/', '.\\spec\\mailboxes\\'
 

spec/rspec/rails/example/mailer_example_group_spec.rb

@@ -1,5 +1,5 @@
 module RSpec::Rails
-  RSpec.describe MailerExampleGroup do
+  RSpec.describe MailerExampleGroup, :with_isolated_config do
     module ::Rails; end
     before do
       allow(Rails).to receive_message_chain(:application, :routes, :url_helpers).and_return(Rails)

spec/rspec/rails/example/model_example_group_spec.rb

@@ -1,5 +1,5 @@
 module RSpec::Rails
-  RSpec.describe ModelExampleGroup do
+  RSpec.describe ModelExampleGroup, :with_isolated_config do
     it_behaves_like "an rspec-rails example group mixin", :model,
                     './spec/models/', '.\\spec\\models\\'
   end

spec/rspec/rails/example/rails_example_group_spec.rb

@@ -1,5 +1,5 @@
 module RSpec::Rails
-  RSpec.describe RailsExampleGroup do
+  RSpec.describe RailsExampleGroup, :with_isolated_config do
     it 'supports tagged_logger' do
       expect(described_class.private_instance_methods).to include(:tagged_logger)
     end