Native s3 sync (#23)

* Native S3 sync implementation

* fix imports

* fix paths reading

* install s3 components duriing test stage

tests/ahriman/core/upload/conftest.py

@@ -0,0 +1,22 @@
+import pytest
+
+from collections import namedtuple
+from typing import List
+from unittest.mock import MagicMock
+
+from ahriman.core.configuration import Configuration
+from ahriman.core.upload.s3 import S3
+
+
+_s3_object = namedtuple("s3_object", ["key", "e_tag", "delete"])
+
+
+@pytest.fixture
+def s3(configuration: Configuration) -> S3:
+    return S3("x86_64", configuration)
+
+
+@pytest.fixture
+def s3_remote_objects() -> List[_s3_object]:
+    delete_mock = MagicMock()
+    return list(map(lambda item: _s3_object(f"x86_64/{item}", f"\"{item}\"", delete_mock), ["a", "b", "c"]))