[BUG] java generator config param bigDecimalAsString uses jackson breaks libs with gson

[rainmanhhh]

Description

if bigDecimalAsString set to true, BigDecimal fields will be annotated by jackson(@JsonSerialize(using = ToStringSerializer.class)) but gson libs such as okhttp-gson does not depend on jackson

openapi-generator version

4.3.1

Suggest a fix

disable bigDecimalAsString for gson libs or create gson implementation