Move group global hook registration into configure_group.

This ensures that if we need to re-configure a group hooks
registration happens appropriately.

Also, do the same for example configuration.

lib/rspec/core/configuration.rb

@@ -1304,6 +1304,8 @@ def prepend(mod, *filters)
       # Used internally to extend a group with modules using `include`, `prepend` and/or
       # `extend`.
       def configure_group(group)
+        group.hooks.register_globals(group, hooks)
+
         configure_group_with group, @include_modules, :safe_include
         configure_group_with group, @extend_modules,  :safe_extend
         configure_group_with group, @prepend_modules, :safe_prepend
@@ -1313,7 +1315,8 @@ def configure_group(group)
       #
       # Used internally to extend the singleton class of a single example's
       # example group instance with modules using `include` and/or `extend`.
-      def configure_example(example)
+      def configure_example(example, example_hooks)
+        example_hooks.register_global_singleton_context_hooks(example, hooks)
         singleton_group = example.example_group_instance.singleton_class
 
         # We replace the metadata so that SharedExampleGroupModule#included

lib/rspec/core/example.rb

@@ -229,8 +229,7 @@ def example_group
       def run(example_group_instance, reporter)
         @example_group_instance = example_group_instance
         @reporter = reporter
-        hooks.register_global_singleton_context_hooks(self, RSpec.configuration.hooks)
-        RSpec.configuration.configure_example(self)
+        RSpec.configuration.configure_example(self, hooks)
         RSpec.current_example = self
 
         start(reporter)

lib/rspec/core/example_group.rb

@@ -426,7 +426,6 @@ def self.set_it_up(description, args, registration_collection, &example_group_bl
 
         @currently_executing_a_context_hook = false
 
-        hooks.register_globals(self, RSpec.configuration.hooks)
         RSpec.configuration.configure_group(self)
       end