[BUG][SPRING] SpringBoot module generates api with wrong date format on nested objects

Created by: qbixsd

Bug Report Checklist

Have you provided a full/minimal spec to reproduce the issue?
Have you validated the input using an OpenAPI validator (example)?
What's the version of OpenAPI Generator used?
Have you search for related issues/PRs?
What's the actual output vs expected output?
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Description

When setting contract, that accepts object with string defined as date, the default format to parse that is still SHORT, instead of ISO. The issue https://github.com/OpenAPITools/openapi-generator/issues/2053 has fixed the problem only when the controller method accepts the date directly. It's not working as supposed, when the controller accepts the objects based on query params.

openapi-generator version

4.2.3

OpenAPI declaration file content or url

https://github.com/qbixsd/openapi-test/blob/master/openapi-test-contract/src/main/resources/api.yaml

Command line used for generation

mvn clean compile

Steps to reproduce

run tests for openapi-test-implementation module from https://github.com/qbixsd/openapi-test

test for firstEndpoint (with dates defined at contract root) passes with ISO dates
both tests for secondEndpoint (with dates defined in nested objects) fail due to contract accepting dates as SHORT instead of ISO

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/issues/2053

Suggest a fix

Maybe it would be a good idea to fill in Json deserializing annotations on given properties in a model?