[FEATURE] Add configuration key lombok.builder.toBuilder

[mmefremov]

According to the testing methodology adopted in the company, the template of test object is created before the tests. Then in each test, only one field of the copy recieved via toBuilder is changed. When testing GrapgQL services, we get POJO classes by generating code using mapstruct-processor and lombok-mapstruct-binding. We have encountered a problem that it is not possible to enable toBuilder in any way in this case. Please consider adding an appropriate configuration key to lombok.config that sets toBuilder = true by default for all classes in scope

lombok.builder.toBuilder = true

This will give developers more control over the result of code generation, especially on testing projects.