[rust] Fix declaration for arrays with object and array references

[tvrg]

For arrays with an item defined by reference to an array or an object,
the generated type declaration was Vec<core::models::Array> or
Vec<core::models::Map> without defining a Array or Map so that the
code didn't compile.

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[tvrg]

Can I do something to fix the build? It complains about modifications to the typescript-axios client which I haven't touched knowingly.

[wing328]

@tvrg can you please resolve the merge conflicts when you've time? I'll then take a look at the build errors if it still occurs.

[tvrg]

@wing328 Done!