COPY: secure media -> secure uploads (#24643)

Fixing up the last few holdouts

config/locales/server.en.yml

@@ -233,7 +233,7 @@ en:
       default_tags_already_selected: "You cannot select a tag used in another list."
       s3_upload_bucket_is_required: "You cannot enable uploads to S3 unless you've provided the 's3_upload_bucket'."
       enable_s3_uploads_is_required: "You cannot enable usage of the S3 inventory unless you've enabled S3 uploads."
-      page_publishing_requirements: "Page publishing cannot be enabled if secure media is enabled."
+      page_publishing_requirements: "Page publishing cannot be enabled if secure uploads is enabled."
       s3_backup_requires_s3_settings: "You cannot use S3 as backup location unless you've provided the '%{setting_name}'."
       s3_bucket_reused: "You cannot use the same bucket for 's3_upload_bucket' and 's3_backup_bucket'. Choose a different bucket or use a different path for each bucket."
       secure_uploads_requirements: "S3 uploads and S3 ACLs must be enabled before enabling secure uploads."

plugins/chat/spec/plugin_spec.rb

@@ -236,8 +236,8 @@ describe Chat do
     end
   end
 
-  describe "secure media compatibility" do
-    it "disables chat uploads if secure media changes from disabled to enabled" do
+  describe "secure uploads compatibility" do
+    it "disables chat uploads if secure uploads changes from disabled to enabled" do
       enable_secure_uploads
       expect(SiteSetting.chat_allow_uploads).to eq(false)
       last_history = UserHistory.last

plugins/chat/spec/validators/chat_allow_uploads_validator_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Chat::AllowUploadsValidator do
     expect(validator.valid_value?("f")).to eq(true)
   end
 
-  context "when secure media is enabled" do
+  context "when secure uploads is enabled" do
     before do
       SiteSetting.chat_allow_uploads = false
       enable_secure_uploads