Disable cross-database query check due to frequent segfaults

The use of PgQuery.parse(sql) is causing segfaults so we will disable
this for now

spec/support/database/prevent_cross_joins.rb

@@ -72,13 +72,10 @@ ALLOW_LIST = Set.new(YAML.load_file(Rails.root.join('.cross-join-allowlist.yml')
 RSpec.configure do |config|
   config.include(::Database::PreventCrossJoins::SpecHelpers)
 
-  config.around do |example|
+  # TODO: remove `:prevent_cross_joins` to enable the check by default
+  config.around(:each, :prevent_cross_joins) do |example|
     Thread.current[:has_cross_join_exception] = false
 
-    if ALLOW_LIST.include?(example.file_path)
-      example.run
-    else
-      with_cross_joins_prevented { example.run }
-    end
+    with_cross_joins_prevented { example.run }
   end
 end

spec/support_specs/database/prevent_cross_joins_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 RSpec.describe Database::PreventCrossJoins do
-  context 'when running in a default scope' do
+  context 'when running in :prevent_cross_joins scope', :prevent_cross_joins do
     context 'when only non-CI tables are used' do
       it 'does not raise exception' do
         expect { main_only_query }.not_to raise_error
@@ -32,6 +32,14 @@ RSpec.describe Database::PreventCrossJoins do
     end
   end
 
+  context 'when running in a default scope' do
+    context 'when CI and non-CI tables are used' do
+      it 'does not raise exception' do
+        expect { main_and_ci_query }.not_to raise_error
+      end
+    end
+  end
+
   private
 
   def main_only_query