Capistrano::FileNotFound: Rails assets manifest file (or backup file) not found : deploy:rollback

I'm trying `deploy:rollback` to staging from my local machine, everything else is successful, but when it tries to do `deploy:assets:restore_manifest` it fails saying it cannot find the manifest file.

On further debugging, I found that it uses the ruby kernel's `test` method to check if the source and destination are present, as in this line [here](https://github.com/capistrano/rails/blob/master/lib/capistrano/tasks/assets.rake#L93)

But the problem is that the file is present in the remote. Then I debugged more by changing the source and target to my local system's file paths, and it seems that the `test` method to check the file name runs on the local system and not on the remote, only the `execute` commands are running on the remote, so it fails to find the asset manifest file on my local and fails.

Is there anything I might be missing, What should I do to fix this issue?

### Steps to reproduce
Running `cap staging deploy:rollback` from local machine to a remote server.

### Expected behavior
The `test` method should have run on the remote and should have not returned false, the files are present on the remote server.

### Actual behavior
The `test` method in `assets:restore_manifest` runs on local and checks the presence of the source and target(the manifest files) on the local and returns false and thus deployment fails.

### System configuration
https://gist.github.com/snkshukla/2a3bbb9cbfe8f6e957c5add25c2a055f

Start with lib/capistrano/tasks/assets.rake around line 93 and reproduce with cap staging deploy:rollback. Trace deploy:assets:restore_manifest to confirm which checks run locally versus through remote execute commands; done means rollback restores the remote manifest or backup without failing when the files exist remotely.

Written by the indexing model from the issue text.