Revert "Use ref in ComponentThread::joltThreadReq"

This reverts commit 2222491c21.

The thread lifetime ops need to use sh_ptrs because apparently the
thread objects go out of scope at some point during shutdown, before
the threads can actually finish shutting down.

libspinscale/include/spinscale/componentThread.h

@@ -125,8 +125,14 @@ public:
 	 * JOLTing is the mechanism that allows threads to enter their main
 	 * event loops and set up TLS vars after all global constructors have
 	 * completed. This prevents race conditions during system startup.
+	 *
+	 * @param selfPtr Shared pointer to this thread (required because TLS
+	 *                isn't set up yet, so shared_from_this() can't be used)
+	 * @param callback Callback to invoke when JOLT completes
 	 */
-	void joltThreadReq(Callback<threadLifetimeMgmtOpCbFn> callback);
+	void joltThreadReq(
+		const std::shared_ptr<PuppetThread>& selfPtr,
+		Callback<threadLifetimeMgmtOpCbFn> callback);
 
 	// CPU management methods
 	void pinToCpu(int cpuId);