chore: simplify error when docker context is not found

internal/core/docker_context.go

@@ -298,7 +298,7 @@ func GetDockerHostFromCurrentContext() (string, error) {
 		}
 	}
 
-	return "", errors.New("no Docker host found in the current context")
+	return "", ErrDockerSocketNotSetInDockerContext
 }
 
 // currentContext returns the current context name, based on

internal/core/docker_host.go

@@ -273,7 +273,7 @@ func dockerHostFromDockerContext(ctx context.Context) (string, error) {
 		return dockerHost, nil
 	}
 
-	return "", errors.Join(ErrDockerSocketNotSetInDockerContext, err)
+	return "", err
 }
 
 // dockerHostFromProperties returns the docker host from the ~/.testcontainers.properties file, if it's not empty