hof: Nested module replace directives are ignored

As written here

https://github.com/hofstadter-io/hof/blob/ac766d2494f3968a0e2836a52fd206ae278d4563/lib/mod/modder/modder_vendor.go#L153

module replace directive are ignored for nested dependencies. But since the original directive is put in cue.sums, it fails when having nested dependencies.

One simple way to reproduce it is by including a dependency that depends on another lib using a replace statement.

If I do not ignore the replace directive:

err = m.LoadMetaFiles(mdr.ModFile, mdr.SumFile, mdr.MappingFile, false) 

it does work, but I suspect there is a reason behind this ignore that I missed. Another way to fix it - I guess - would be to use the replace directive inside the cue.sums file.