Consider adding `jackson-datatype-jsr310` to Web starter

[vpavic]

In a similar fashion like #9229, it would be nice if Web starter would pull in jackson-datatype-jsr310 module.

In addition, perhaps a case could be made for other modules that are a part of jackson-modules-java8.

[snicoll]

There are more than one starter where Jackson is provided. I guess spring-boot-starter-jackson is a bit weird, the alternative is that we should include in the data-rest and webflux starters (perhaps jersey as well?).

A dedicated starter would make #400 much easier to implement in a customization though.

[philwebb]

I think a starter makes sense, we don't want to duplicate the same dependencies all over the shop Perhaps we should call it something more general like spring-boot-starter-json?

[snicoll]

dedicated starter would make #400 much easier to implement in a customization though.

I take it back. This would be a transitive dependency of a starter chosen on the initializr so that wouldn't change anything.