[SYCL][CUDA] Make active context persitant (#2016)

Whenever there is no CUDA context assigned to a thread,
once it is set, this context remains set until destruction of the
thread.
Previously it was only the primary context the one persistent.

Signed-off-by: Ruyman Reyes <[email protected]>

Author: Ruyk

sycl/plugins/cuda/pi_cuda.cpp

@@ -166,11 +166,11 @@ class ScopedContext {
     if (original_ != desired) {
       // Sets the desired context as the active one for the thread
       PI_CHECK_ERROR(cuCtxSetCurrent(desired));
-      if (original_ == nullptr && ctxt->is_primary()) {
-        // No context is installed and the suggested context is primary
+      if (original_ == nullptr) {
+        // No context is installed on the current thread
         // This is the most common case. We can activate the context in the
         // thread and leave it there until all the PI context referring to the
-        // same underlying CUDA primary context are destroyed. This emulates
+        // same underlying CUDA context are destroyed. This emulates
         // the behaviour of the CUDA runtime api, and avoids costly context
         // switches. No action is required on this side of the if.
       } else {