Allow access to physical groups in distributed fashion

Maybe this is possible, but I haven't found a way to do this in a parallel way, but I'm trying to adapt some parts of Tutorial 3 to a distributed fashion.

In there, the parts I want to copy is:
```
model = GmshDiscreteModel(parts, "./geometry.msh")
labels = get_face_labeling(model)
tags = get_face_tag(labels,dimension)

function σ_bimat(ε,tag)
if tag == alu_tag
return λ_alu*tr(ε)*one(ε) + 2*μ_alu*ε
else
return λ_steel*tr(ε)*one(ε) + 2*μ_steel*ε
end
end

a(u,v) = ∫( ε(v) ⊙ (σ_bimat∘(ε(u),tags)) )*dΩ
```
So I want to use different parameters depending on the 3d physical group of the element. I was wondering if and how this is possible in a distributed fashion, since with this direct code I get:

ERROR: LoadError: MethodError: no method matching get_face_tag(::GridapDistributed.DistributedFaceLabeling{MPIData{FaceLabeling, 1}}, ::Int64)