perf:optimize error message for S3BucketNotFoundError (#407)

Author: LoveEatCandy

megfile/errors.py

@@ -342,13 +342,16 @@ def translate_s3_error(s3_error: Exception, s3_url: PathLike) -> Exception:
     elif isinstance(s3_error, ClientError):
         code = client_error_code(s3_error)
         if code in ("NoSuchBucket"):
-            return S3BucketNotFoundError(
-                "No such bucket: %r"
-                % s3_error.response.get(  # pytype: disable=attribute-error
+            bucket_or_url = (
+                s3_error.response.get(  # pytype: disable=attribute-error
                     "Error", {}
                 ).get("BucketName")
                 or s3_url
             )
+            return S3BucketNotFoundError(
+                "No such bucket: %r, endpoint: %r"
+                % (bucket_or_url, s3_endpoint_url(s3_url))
+            )
         if code in ("404", "NoSuchKey"):
             return S3FileNotFoundError("No such file: %r" % s3_url)
         if code in ("401", "403", "AccessDenied"):