Replace deprecated UploadIO constant

Summary:
This constant was deprecated in `multipart-post` v2.2.0 [1] but `faraday-multipart` v1.0.4 introduced a workaround to avoid the deprecated constant warning [2]. This commit switches out `UploadIO` references to use the `Faraday` namespaced one.

[1]: socketry/multipart-post@cb18a32
[2]: lostisland/faraday-multipart@2127a0c

X-link: facebook/facebook-ruby-business-sdk#204

Reviewed By: mengxuanzhangz

Differential Revision: D52926662

Pulled By: stcheng

fbshipit-source-id: b999d59c992b0351924bdfb10d33ab34de788c69

templates/ruby/lib/facebook_ads/api_request.rb

@@ -97,14 +97,14 @@ def batch_body
     # For Batch API
     def params_without_files
       params.reject do |_,v|
-        v.is_a?(UploadIO)
+        v.is_a?(Faraday::UploadIO)
       end
     end
 
     # For Batch API
     def files
       params.select do |_,v|
-        v.is_a?(UploadIO)
+        v.is_a?(Faraday::UploadIO)
       end
     end
   end

templates/ruby/lib/facebook_ads/field_types/upload_file.rb

@@ -77,9 +77,9 @@ def serialize(value)
             if category == :video
               FacebookAds::VideoIO.new(value, content_type)
             else
-              ::UploadIO.new(value, content_type)
+              Faraday::UploadIO.new(value, content_type)
             end
-          when UploadIO
+          when Faraday::UploadIO
             value
           # when etc etc TODO Rails/Sinatra Upload
           else
@@ -98,7 +98,7 @@ def content_type_for(ext)
       end
 
       def self.acceptable?(value)
-        [File, Tempfile, UploadIO].each do |type|
+        [File, Tempfile, Faraday::UploadIO].each do |type|
           return true if value.is_a?(type)
         end
 

templates/ruby/lib/facebook_ads/videos/video_io.rb

@@ -7,7 +7,7 @@
 require 'faraday/multipart'
 
 module FacebookAds
-  class VideoIO < ::UploadIO
+  class VideoIO < Faraday::UploadIO
     def is_video?
       true
     end