Fix oldfiles picker ignoring entries for remote files

[speelbarrow]

Description

Fixes #3520.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list relevant details about your configuration

• Local visual testing
  Before:
  
  After:
  
  Note how the exclusion of the current file from the list persists after the changes are implemented.

Configuration:

• Neovim version (nvim --version):
• Operating system and version:

Checklist:

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (lua annotations)