Use `ActiveRecord::FixtureSet.signed_global_id` defined by the globalid gem

Also make explicit that actiontext depends on the globalid gem.

Gemfile.lock

@@ -55,6 +55,7 @@ PATH
       activerecord (= 7.0.0.alpha2)
       activestorage (= 7.0.0.alpha2)
       activesupport (= 7.0.0.alpha2)
+      globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
     actionview (7.0.0.alpha2)
       activesupport (= 7.0.0.alpha2)
@@ -244,7 +245,7 @@ GEM
     fugit (1.5.0)
       et-orbi (~> 1.1, >= 1.1.8)
       raabro (~> 1.4)
-    globalid (0.5.2)
+    globalid (0.6.0)
       activesupport (>= 5.0)
     google-apis-core (0.3.0)
       addressable (~> 2.5, >= 2.5.1)
@@ -285,7 +286,7 @@ GEM
     hiredis (0.6.3)
     http_parser.rb (0.6.0)
     httpclient (2.8.3)
-    i18n (1.8.10)
+    i18n (1.8.11)
       concurrent-ruby (~> 1.0)
     image_processing (1.12.1)
       mini_magick (>= 4.9.5, < 5)
@@ -312,11 +313,11 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
-    marcel (1.0.1)
+    marcel (1.0.2)
     memoist (0.16.2)
     method_source (1.0.0)
     mini_magick (4.11.0)
-    mini_mime (1.1.0)
+    mini_mime (1.1.2)
     mini_portile2 (2.5.3)
     minitest (5.14.4)
     minitest-bisect (1.5.1)
@@ -337,7 +338,7 @@ GEM
       ruby2_keywords (~> 0.0.1)
     net-http-persistent (4.0.1)
       connection_pool (~> 2.2)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.7)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -520,7 +521,7 @@ GEM
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.5.0)
+    zeitwerk (2.5.1)
 
 PLATFORMS
   ruby

actiontext/actiontext.gemspec

@@ -38,4 +38,5 @@ Gem::Specification.new do |s|
   s.add_dependency "actionpack",    version
 
   s.add_dependency "nokogiri", ">= 1.8.5"
+  s.add_dependency "globalid", ">= 0.6.0"
 end

activerecord/lib/active_record/fixtures.rb

@@ -585,14 +585,6 @@ module ActiveRecord
         end
       end
 
-      def signed_global_id(fixture_set_name, label, column_type: :integer, **options)
-        identifier = identify(label, column_type)
-        model_name = default_fixture_model_name(fixture_set_name)
-        uri = URI::GID.build([GlobalID.app, model_name, identifier, {}])
-
-        SignedGlobalID.new(uri, **options)
-      end
-
       # Superclass for the evaluation contexts used by ERB fixtures.
       def context_class
         @context_class ||= Class.new