DEV: Set uploads_id_seq starting point before tests (#15215)

Some tests don't pass when this is elevated. They should be fixed,
since, at some point, we may create enough uploads during tests that
they fail naturally.

spec/rails_helper.rb

@@ -235,6 +235,12 @@ RSpec.configure do |config|
     SiteSetting.provider = TestLocalProcessProvider.new
 
     WebMock.disable_net_connect!
+
+    if ENV['ELEVATED_UPLOADS_ID']
+      DB.exec "SELECT setval('uploads_id_seq', 10000)"
+    else
+      DB.exec "SELECT setval('uploads_id_seq', 1)"
+    end
   end
 
   class TestLocalProcessProvider < SiteSettings::LocalProcessProvider