feat(storage): fetch file and bucket details from url

[shubhangi-google]

Description

from_gs_url is a method to fetch bucket details and file details from a provided Google Storage (gs) URL.

Implementation Example

# @example Fetch bucketName and fileName from a gs URL:
   require "google/cloud/storage"
   gs_url = "gs://my-todo-app/avatars/heidi.jpeg"
   file = Google::Cloud::Storage::File
   file.from_gs_url(gs_url)
   =>
   {"bucket_name" => "my-todo-app", "file_path" => "avatars/heidi.jpeg"}

closes: #21550

[bajajneha27]

Overall looks good. Just two comments.

[bajajneha27]

Just one tiny comment. Post that, we should be able to merge it.