RHELMISC-7213: Fix share folder handle_exceptions

Fix retry behavior in handle_exceptions when share_folder fails.
Previously, when share_folder failed, handle_exceptions would retry
the entire block, attempting to create an already existing folder.
This led to unnecessary retries and potential errors.

Now the operations are separated:
- Folder creation has its own exception handling block
- Share folder and link generation are handled separately
- Prevents redundant folder creation attempts during retries

This ensures cleaner retry logic and proper error handling for
each operation independently.

Signed-off-by: Vitalii Chulak <[email protected]>

lib/resultuploaders/dropbox/dropbox.rb

@@ -120,7 +120,7 @@ def connect
     def create_project_folder
       handle_exceptions(__method__) do
         @path = "/#{@repo}/CI/#{@tag}-#{@timestamp}"
-        @dropbox.create_folder(@path)
+        @dropbox.create_folder(@path) unless folder_exists?(@path)
         @dropbox.share_folder(@path)
         @url = "#{@dropbox.create_shared_link_with_settings(@path).url}&lst="
         @logger.info("Dropbox project folder created: #{@url}")
@@ -153,6 +153,12 @@ def delete_file(r_name)
       end
     end
 
+    def folder_exists?(folder_path)
+      @dropbox.get_metadata(folder_path).is_a?(DropboxApi::Metadata::Folder)
+    rescue DropboxApi::Errors::NotFoundError
+      false
+    end
+
     def close; end
   end
 end