Create proper HttpUrl validator
We only have a module that has the validation method, but it would be helpful to expose proper http url validator.
Fixes #32892 - add rails URL validator
We only exposed module implementing the URL validation, we should
provide a proper HTTP URL attributes validation.
This is much more convenient way to expose validations to new setting
DSL, so the only user of this validation `http_proxy` setting
is a cause for this change.