registries: make registration dynamic

Rather than having to manually hook code for registries, add a small
registration function to the registry header and use this registration
results throughout the registry interactions.

Tested:

Confirmed registries have same behavior.

```
$ curl -s -k https://localhost:18080/redfish/v1/Registries/ | jq '.Members | map(."@odata.id")'
[
  "/redfish/v1/Registries/Base",
  "/redfish/v1/Registries/HeartbeatEvent",
  "/redfish/v1/Registries/OpenBMC",
  "/redfish/v1/Registries/ResourceEvent",
  "/redfish/v1/Registries/TaskEvent",
  "/redfish/v1/Registries/Telemetry"
]
```

```
$ curl -s -k https://localhost:18080/redfish/v1/Registries/TaskEvent/TaskEvent | jq ".Messages | keys"
[
  "TaskAborted",
  "TaskCancelled",
  "TaskCompletedOK",
  "TaskCompletedWarning",
  "TaskPaused",
  "TaskProgressChanged",
  "TaskRemoved",
  "TaskResumed",
  "TaskStarted"
]
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iaa355420736a2587d9da4e995208d579443ca9b8
diff --git a/redfish-core/src/heartbeat_messages.cpp b/redfish-core/src/heartbeat_messages.cpp
index 3cef110..2f9575e 100644
--- a/redfish-core/src/heartbeat_messages.cpp
+++ b/redfish-core/src/heartbeat_messages.cpp
@@ -31,16 +31,16 @@
 namespace messages
 {
 
-static nlohmann::json getLog(redfish::registries::heartbeat_event::Index name,
+static nlohmann::json getLog(redfish::registries::HeartbeatEvent::Index name,
                              std::span<const std::string_view> args)
 {
     size_t index = static_cast<size_t>(name);
-    if (index >= redfish::registries::heartbeat_event::registry.size())
+    if (index >= redfish::registries::HeartbeatEvent::registry.size())
     {
         return {};
     }
-    return getLogFromRegistry(redfish::registries::heartbeat_event::header,
-                              redfish::registries::heartbeat_event::registry,
+    return getLogFromRegistry(redfish::registries::HeartbeatEvent::header,
+                              redfish::registries::HeartbeatEvent::registry,
                               index, args);
 }
 
@@ -54,7 +54,7 @@
 nlohmann::json redfishServiceFunctional()
 {
     return getLog(
-        redfish::registries::heartbeat_event::Index::redfishServiceFunctional,
+        redfish::registries::HeartbeatEvent::Index::redfishServiceFunctional,
         {});
 }