Improve bridge error that users may encounter

[odow]

x-ref: #1216

Improve this error in the bridges:

MathOptInterface.jl/src/Bridges/bridge.jl

Line 69 in e817d20

return throw(ArgumentError("Bridge of type `$(typeof(bridge))` does not support accessing the attribute `$attr`."))

It should say something like:

"If you encountered this error unexpectedly, it probably means your model has been reformulated using the bridge, and you are attempting to query an attribute that we haven't implemented yet for this bridge. Please open an issue at https://github.com/jump-dev/MathOptInterface.jl/issues/new and provide a reproducible example explaining what you were trying to do."