Covalent-ssh-plugin

Changed

- Renaming `credentials_file` to `ssh_key_file` to not have name conflict with key referring to cloud credential files

Fixed

- Fixed get_status to correctly assert if remote result file exists

Changed

- Updated requirements.txt to pin covalent to version 0.177.0.post1.dev0

Tests

- Fixed config manager related test which broke as a result of changes in covalent

Changed

- Using covalent on `develop` rather than the stable version
- Using `RemoteExecutor` now instead of `BaseAsyncExecutor`
- Renamed `ssh_key_file` to `credentials_file` which is passed to the super class instead

Added

- Implementation of abstract functions added to adhere to the `RemoteExecutor`'s template

Changed

- Changed python_path arg to conda_env in executor init for functional tests

Added

- Added basic functional test for CI