[DOP-22140] Add API schemas for SFTP, FTP, FTPS, WebDAV, Samba file sources

[IlyasDevelopment]

Change Summary

Added API schemas for:

• SFTP
• FTP
• FTPS
• WebDAV
• Samba

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (d83ad79) to head (a65adde).
Report is 1 commits behind head on develop.

Additional details and impacted files

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