* ufw: escalate privileges in integration tests
A few of the integration tests for the UFW module forgot to `become`.
This is problematic if the test suite is executed as a non-privileged
user. This commit amends that by adding `become` when appropriate.
* ufw: add unit tests for direction and interface
Extend the unit tests for the UFW module to test the `direction` and
`interface` parameters. This will help in the implementation of a fix
for issue #63903.
* ufw: add support for interface_in and interface_out
The UFW module has support for specifying `direction` and `interface`
for UFW rules. Rules with these parameters are built such that
per-interface filtering only apply to a single direction based on the
value of `direction`.
Not being able to specify multiple interfaces complicates things for
`routed` rules where one might want to apply filtering only for a
specific combination of `in` and `out` interfaces.
This commit introduces two new parameters to the UFW module:
`interface_in` and `interface_out`. These rules are mutually exclusive
with the old `direction` and `interface` parameter because of the
ambiguity of having e.g.:
direction: XXX
interface: foo
interface_XXX: bar
Fixes#63903
