WFCORE-6663 Introduce AttributeDefinition implementations to wildfly-subsystem that can resolve directly to a ServiceDependency

[pferraro]

https://issues.redhat.com/browse/WFCORE-6663

e.g.

static CapabilityReferenceAttributeDefinition<Foo> FOO = new CapabilityReferenceAttributeDefinition.Builder("foo", CapabilityReference.builder(CAPABILITY, Foo.SERVICE_DESCRIPTOR).build()).build();

static CapabilityReferenceListAttributeDefinition<Bar> BAR = new CapabilityReferenceListAttributeDefinition.Builder("bar", CapabilityReference.builder(CAPABILITY, Bar.SERVICE_DESCRIPTOR).build()).build();

Within an operation runtime handler, we can use the context of the capability reference to resolve our attribute from the model directly to a ServiceDependency:

ServiceDependency<Foo> foo = FOO.resolve(context, model);

ServiceDependency<List<Bar>> bars = BAR.resolve(context, model);

If FOO is not required, the resulting ServiceDependency will either return a null, or, if the service descriptor provides alternate default resolution, will result to the default value.
Similarly, as a multi-value attribute, BAR resolves to a service dependency providing an empty list if not required.

[bstansberry]

@pferraro This looks fine in general (and I know Yeray reviewed it carefully). I made some minor javadoc comments, and then a somewhat more substantial one about IOSubsystemRegistrar, which, if valid should be simple to correct.

[bstansberry]

SimpleResource should also have javadoc for methods where it throws OSE.

[pferraro]

All missing javadocs added.

[pferraro]

Rebased against main.

[yersan]

Thanks @pferraro @bstansberry