Remove a lot of "dead code" around #createVariant logic

The getParametersInfoAnnotation(Node) in ParametersInfoAnnotationUtils is broken for new style container item components referencing the catalog item: Those container item nodes namely do not have the classname property any more. It was tried to fix this in

public static ParametersInfo getParametersInfoAnnotation(final Node componentItemNode) throws RepositoryException {
    

by including

 final Node componentNode = componentItemNode.hasProperty(COMPONENT_PROPERTY_COMPONENTDEFINITION) ? componentItemNode.getSession()
                    .getNode(componentItemNode.getProperty(COMPONENT_PROPERTY_COMPONENTDEFINITION).getValue().getString()) : componentItemNode;

however the code above can not work since COMPONENT_PROPERTY_COMPONENTDEFINITION does not store an absolute jcr path to a node!

However, it turns out that the entire invocation chain to org.hippoecm.hst.util.ParametersInfoAnnotationUtils#getParametersInfoAnnotation(javax.jcr.Node) is completely unused! In java code, it is only invoked via

ContainerItemComponentResourceInterface#createVariant

However the frontend CM code NEVER invokes this method, also not for relevance! Variants are created differently.

In file community/channel-manager/frontend-api/src/main/resources/org/onehippo/cms7/channelmanager/channeleditor/ComponentVariantAdder.js on line 5 a method gets defined which would call the #createVariant, however that method never gets invoked

Hence we can and must do the following:

1) Remove the broken

 final Node componentNode = componentItemNode.hasProperty(COMPONENT_PROPERTY_COMPONENTDEFINITION) ? componentItemNode.getSession()
                    .getNode(componentItemNode.getProperty(COMPONENT_PROPERTY_COMPONENTDEFINITION).getValue().getString()) : componentItemNode;

2) Deprecate org.hippoecm.hst.util.ParametersInfoAnnotationUtils#getParametersInfoAnnotation(javax.jcr.Node) as of 14.3 (it is in commons so fully deleting is too much)

3) Remove the entire call chain which is unused in the page composer from the HST

4) Remove the code in the CM which is dead code