Temporarily disable Azure service tests (rails#43091)

The Azure service tests are currently failing on the main branch,
probably because of configuration. We can temporarily disable them while
we get things working again.

Author: p8

activestorage/test/test_helper.rb

@@ -27,6 +27,12 @@
   puts "Missing service configuration file in test/service/configurations.yml"
   {}
 end
+# Azure service tests are currently failing on the main branch.
+# We temporarily disable them while we get things working again.
+if ENV["CI"]
+  SERVICE_CONFIGURATIONS.delete(:azure)
+  SERVICE_CONFIGURATIONS.delete(:azure_public)
+end
 
 require "tmpdir"