induced_subgraph does not preserve weights for edge lists.

[simonschoelly]

Description of bug
When creating an edge induced subgraph of a SimpleWeightedGraph with weights different from one, these weights are not preserved. This is in contrast to a vertex induced subgraph, where this works correctly.

How to reproduce
Detail steps to reproduce the behavior.

Expected behavior

julia> g = SimpleWeightedGraph([0 2; 2 0])
{2, 1} undirected simple Int64 graph with Int64 weights

julia> weights(g)
2×2 SparseArrays.SparseMatrixCSC{Int64, Int64} with 2 stored entries:
 ⋅  2
 2  ⋅

# vertex induced subgraph
julia> weights(first(induced_subgraph(g, [1,2])))
2×2 SparseArrays.SparseMatrixCSC{Int64, Int64} with 2 stored entries:
 ⋅  2
 2  ⋅

# edge induced subgraph
julia> weights(first(induced_subgraph(g, [Edge(1,2)])))
2×2 SparseArrays.SparseMatrixCSC{Int64, Int64} with 2 stored entries:
 ⋅  1
 1  ⋅

The entries in the last spare matrix should also be two, but have been set to the default value of 1.

Version information
Julia: v1.8
Graphs.jl: v1.7.4
SimpleWeightedGraphs: v1.2.1

Additional context
src/overrides.jl contains a specialized version of induced_subgraph for vertex lists, but not for edge list - so we probably have to implement that.