test a lambda locally
Value
Invisibly, the result of [sys::exec_internal()] for the `curl` call to the local container: a list with `status`, and `stdout` and `stderr` as raw vectors. The response is also printed.
Examples
if (FALSE) { # \dontrun{
payload <- list(number = 2)
test_lambda(tag = "parity1", payload)
} # }