Only load what is required from cgi

In Ruby 3.5, most of the cgi gem is removed. Only methods relating to escaping/unescaping are retained.

On versions before Ruby 3.5, `cgi/util` must be required for correct functionality.

https://bugs.ruby-lang.org/issues/21258

Author: Earlopain

build_tools/custom_service.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 require 'json'
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module BuildTools
   class CustomService

gems/aws-sdk-core/lib/aws-sdk-core/endpoints/matchers.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Aws
   module Endpoints

gems/aws-sdk-core/lib/aws-sdk-core/util.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Aws
   # @api private

gems/aws-sdk-core/lib/aws-sdk-core/xml/error_handler.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Aws
   module Xml

gems/aws-sdk-core/lib/seahorse/client/net_http/connection_pool.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 require 'net/http'
 require 'net/https'
 require 'delegate'

gems/aws-sdk-core/lib/seahorse/util.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Seahorse
   # @api private

gems/aws-sdk-s3/lib/aws-sdk-s3/legacy_signer.rb

@@ -3,7 +3,8 @@
 require 'set'
 require 'time'
 require 'openssl'
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 require 'aws-sdk-core/query'
 
 module Aws

gems/aws-sdk-s3/lib/aws-sdk-s3/object_multipart_copier.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 require 'thread'
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Aws
   module S3

gems/aws-sdk-s3/lib/aws-sdk-s3/plugins/url_encoded_keys.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 require 'uri'
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Aws
   module S3

gems/aws-sigv2/lib/aws-sigv2/signer.rb

@@ -3,7 +3,8 @@
 require 'openssl'
 require 'base64'
 require 'uri'
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 
 module Aws
   module Sigv2

gems/aws-sigv4/lib/aws-sigv4/signer.rb

@@ -5,7 +5,8 @@
 require 'time'
 require 'uri'
 require 'set'
-require 'cgi'
+require "cgi/escape"
+require "cgi/util" if RUBY_VERSION < "3.5"
 require 'pathname'
 require 'aws-eventstream'