refactored all functions (#145)

* refactored stat_object

refactored select_object_content

refactor get_presigned_object_url

refactor get_presigned_policy_form_data

refactored upload-part-copy

* fixed object.unwrap

* update region

* made client Arc

* made client Arc

* update client

* update tests

* update segmented_bytes

* bench updated

* cleanup version handling

* cleanup of headers: multimap

* added inner in Client

* updated clients: added Into<String>in API

* Separated http_client and shared client items in Client

.github/workflows/rust.yml

@@ -23,7 +23,7 @@ jobs:
         cargo clippy --all-targets --all-features
         cargo build --bins --examples --tests --benches --verbose
 
-    - name: Run tests
+    - name: Run tests S3
       run: |
         ./tests/start-server.sh
         export SERVER_ENDPOINT=localhost:9000