[SYCL][Test] Replace multi-device kernel_bundle e2e tests with unit test

sycl/unittests/helpers/MockDeviceImage.hpp

@@ -161,7 +161,7 @@ template <typename T> LifetimeExtender(std::vector<T>) -> LifetimeExtender<T>;
 /// Convenience wrapper for sycl_device_binary_property_set.
 class MockPropertySet {
 public:
-  MockPropertySet() {
+  MockPropertySet(const std::vector<DeviceLibExt> &DeviceLibExts = {}) {
     // Most of unit-tests are statically linked with SYCL RT. On Linux and Mac
     // systems that causes incorrect RT installation directory detection, which
     // prevents proper loading of fallback libraries. See intel/llvm#6945
@@ -170,11 +170,23 @@ class MockPropertySet {
     // unless there is a special property attached to it or special env variable
     // is set which forces RT to skip fallback libraries.
     //
-    // Setting this property here so unit-tests can be launched under any
-    // environment.
+    // By default, property is set to empty mask here so that unit-tests can be
+    // launched under any environment. Some unit tests might create dummy
+    // fallback libaries and require fallback libraries to be loaded, in such
+    // case input vector will be non-empty.
 
-    std::vector<char> Data(/* eight elements */ 8,
+    std::vector<char> Data(/* four elements */ 4,
                            /* each element is zero */ 0);
+    if (!DeviceLibExts.empty()) {
+      uint32_t DeviceLibReqMask = 0;
+      for (auto Ext : DeviceLibExts) {
+        DeviceLibReqMask |= 0x1
+                            << (static_cast<uint32_t>(Ext) -
+                                static_cast<uint32_t>(
+                                    DeviceLibExt::cl_intel_devicelib_assert));
+      }
+      std::memcpy(Data.data(), &DeviceLibReqMask, sizeof(DeviceLibReqMask));
+    }
     // Name doesn't matter here, it is not used by RT
     // Value must be an all-zero 32-bit mask, which would mean that no fallback
     // libraries are needed to be loaded.

sycl/unittests/program_manager/CMakeLists.txt

@@ -6,6 +6,7 @@ add_sycl_unittest(ProgramManagerTests OBJECT
   SubDevices.cpp
   passing_link_and_compile_options.cpp
   Cleanup.cpp
+  MultipleDevsKernelBundle.cpp
 )
 
 add_subdirectory(arg_mask)