[julia] Add support for style, explode in query params

[vdayanand]

This PR adds generation of kwargs necessary to configure serialization type deepObject (JuliaComputing/OpenAPI.jl#78)

@tanmaykm

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[tanmaykm]

Looks good to me. Thanks!

[tanmaykm]

Also cc: @wing328

[wing328]

CI tests failed: https://github.com/OpenAPITools/openapi-generator/actions/runs/10105885718/job/27948176976?pr=19238

can you please take a look?

[vdayanand]

@wing328 9d77682 fixed the tests