chore: Use cryptography for the Provider as well. This is to have an easier time pinning the correct OpenSSL version. (#1537)

* chore: Use cryptography for the Provider as well. This is to have an easier time pinning the correct OpenSSL version.

Author: clundin25

google/auth/transport/requests.py

@@ -267,10 +267,9 @@ def __init__(self, enterprise_cert_file_path):
         self.signer = _custom_tls_signer.CustomTlsSigner(enterprise_cert_file_path)
         self.signer.load_libraries()
 
-        if not self.signer.should_use_provider():
-            import urllib3.contrib.pyopenssl
+        import urllib3.contrib.pyopenssl
 
-            urllib3.contrib.pyopenssl.inject_into_urllib3()
+        urllib3.contrib.pyopenssl.inject_into_urllib3()
 
         poolmanager = create_urllib3_context()
         poolmanager.load_verify_locations(cafile=certifi.where())