Don't block while inserting paused threads

Blocking while inserting a paused thread can lead to deadlocks where the inserting thread later resumes the paused thread.

Co-authored-by: Billy Laws <blaws05@gmail.com>

app/src/main/cpp/skyline/kernel/scheduler.cpp

@@ -91,9 +91,9 @@ namespace skyline::kernel {
         std::unique_lock lock{core.mutex};
 
         if (thread->isPaused) {
-            // We cannot insert a thread that is paused, so we need to wait until it has been resumed
-            thread->insertThreadOnResume = false;
-            thread->scheduleCondition.wait(lock, [&]() { return !thread->isPaused; });
+            // We cannot insert a thread that is paused, so we just let the resuming thread insert it
+            thread->insertThreadOnResume = true;
+            return;
         }
 
         #ifndef NDEBUG

app/src/main/cpp/skyline/kernel/scheduler.h

@@ -87,6 +87,7 @@ namespace skyline {
 
             /**
              * @brief Inserts the specified thread into the scheduler queue at the appropriate location based on its priority
+             * @note This is a non-blocking operation when the thread is paused, the thread will only be inserted when it is resumed
              */
             void InsertThread(const std::shared_ptr<type::KThread> &thread);