Adds data source properties to git connectors (#1280)
Adds data source properties to git connectors:
- data_created
- date_modified
- version
- record_locator
These properties are instantiated when supported by the connector.
Separates the logic between fetching the file from source and
`get_file`. Retrieves file metadata when any of the properties are
called.
Adds logic to check if file exists in the remote source. For connectors
that don't directly support it, adds exception handling to check any
issues while retrieving the file.
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Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com>
Co-authored-by: rvztz <rvztz@users.noreply.github.com>
