[REQ] Typescript-axios : Serialize array/multivalue parameters as repeat params, not CSV

Is your feature request related to a problem? Please describe.

I have a defined OpenApi spec with a PUT method that takes an array of Strings as one of its request body parameters. The server that is accepting the request expects the parameters to be passed like:

param=Value1&param=Value2&param=Value3

The typescript-axios generator, however, serializes the request body parameters for an Array to a CSV format. As a result, the server receives a value like:

param=Value1%2CValue2%2CValue3

As a result, the parameters are not being deserialized and read properly on the server side

Describe the solution you'd like

A configuration parameter that would allow the Array to be serializes as a multi-valued parameter for both query parameters or form body parameters

Start by locating the typescript-axios generator's serialization logic for query parameters and form body parameters. Reproduce the issue with an OpenAPI operation containing an array of strings, then determine how configuration should produce repeated param=Value entries instead of CSV output and verify both parameter locations.