Fixes failing import problem of the http backport
provider with Airflow 1.10.* series.

A problem was introduced in #11922 which cause the http provider
to stop working (local import was not caught at the review time
and as local import it has not been caught by the test harness).

Since the http provider is defunct and is very popular, we
decided to release an out-of-band release of the http provider
even if backport providers reached end-of-life.

This PR copies implementation of make_kwargs_callable into http
backport provider to deal with the incompatibility.

Fixes: #15198