Check resource types passed to resource-type-specific functions

[prajnoha]

SID uses "resources" for code encapsulation, grouping, hierarchy and generic handling. Besides generic and shared resource-handling functions, each resource can have additional dedicated interface functions which accept a resource as an argument (of sid_resource_t * type). All these functions should check whether the type of the resource passed in is correct and error out if not (so we need to check the internal type field in sid_resource_t instance).

For example a function where we expect only a concrete single type of resource:

sid_resource_t *worker_control_get_idle_worker(sid_resource_t *worker_control_res);

The worker_control_res here must be an instance of sid_resource_type_worker_control only.

Another example where we allow two types of resources:

const char *worker_control_get_worker_id(sid_resource_t *res);

The res must be an instance of either sid_resource_type_worker or sid_resource_type_worker_proxy.

Similar checks should be done for any other resource which has such additional type-specific interface.