tests: Multiple changes to tests

- Remove all tests for the old encoding logic
- Stop using the `nopecha` test page to test Cloudflare solver
- Remove useless tests like testing for infinite timeout
- Fixes to make the code compatible with new changes

tests/fetchers/test_utils.py

@@ -1,7 +1,7 @@
 import pytest
 from pathlib import Path
 
-from scrapling.engines.toolbelt.custom import ResponseEncoding, StatusText, Response
+from scrapling.engines.toolbelt.custom import StatusText, Response
 from scrapling.engines.toolbelt.navigation import (
     construct_proxy_dict,
     js_bypass_path
@@ -131,12 +131,6 @@ def status_map():
     }
 
 
-def test_parsing_content_type(content_type_map):
-    """Test if parsing different types of 'content-type' returns the expected result"""
-    for header_value, expected_encoding in content_type_map.items():
-        assert ResponseEncoding.get_value(header_value) == expected_encoding
-
-
 def test_parsing_response_status(status_map):
     """Test if using different http responses' status codes returns the expected result"""
     for status_code, expected_status_text in status_map.items():