This is required for modules that may return a non-zero `rc` value for a
successful run, similar to #24865 for Windows fixing **win_chocolatey**.
We also disable the dependency on `rc` value only, even if `failed` was
set.
Adapted unit and integration tests to the new scheme.
Updated raw, shell, script, expect to take `rc` into account.
Simplified the logic, and fix the issue of having a nested list as
entry.
Also indicate that we deliberately want to retain $null values
(and i.e. do not want them to be turned into a boolean).
