Fix crash that could occur if closing the usercard quickly after blocking (#4711)

* Specifically, this adds a caller to the network request, which makes the
success or failure callback not fire.
This has the unintended consequence of the block list not reloading if
the usercard is closed, but it's not a big concern.

* Add unrelated `-DUSE_ALTERNATE_LINKER` cmake option

From https://github.com/heavyai/heavydb/blob/0517d99b467806f6af7b4c969e351368a667497d/CMakeLists.txt#L87-L103

src/providers/twitch/api/Helix.hpp

@@ -805,12 +805,12 @@ public:
         HelixFailureCallback failureCallback) = 0;
 
     // https://dev.twitch.tv/docs/api/reference#block-user
-    virtual void blockUser(QString targetUserId,
+    virtual void blockUser(QString targetUserId, const QObject *caller,
                            std::function<void()> successCallback,
                            HelixFailureCallback failureCallback) = 0;
 
     // https://dev.twitch.tv/docs/api/reference#unblock-user
-    virtual void unblockUser(QString targetUserId,
+    virtual void unblockUser(QString targetUserId, const QObject *caller,
                              std::function<void()> successCallback,
                              HelixFailureCallback failureCallback) = 0;
 
@@ -1118,11 +1118,12 @@ public:
                     HelixFailureCallback failureCallback) final;
 
     // https://dev.twitch.tv/docs/api/reference#block-user
-    void blockUser(QString targetUserId, std::function<void()> successCallback,
+    void blockUser(QString targetUserId, const QObject *caller,
+                   std::function<void()> successCallback,
                    HelixFailureCallback failureCallback) final;
 
     // https://dev.twitch.tv/docs/api/reference#unblock-user
-    void unblockUser(QString targetUserId,
+    void unblockUser(QString targetUserId, const QObject *caller,
                      std::function<void()> successCallback,
                      HelixFailureCallback failureCallback) final;