layers: Update expected error for invalid image view

ImageViewDescriptorUpdateError test was checking for lowercase hex
handle 0xbaadbeef which wasn't the same cross-platform. Removed the
handle from the expected error.
diff --git a/tests/layer_validation_tests.cpp b/tests/layer_validation_tests.cpp
index e0c7eab..a2bd301 100644
--- a/tests/layer_validation_tests.cpp
+++ b/tests/layer_validation_tests.cpp
@@ -5825,7 +5825,7 @@
     m_errorMonitor->SetDesiredFailureMsg(VK_DEBUG_REPORT_ERROR_BIT_EXT,
                                          "Attempted write update to combined "
                                          "image sampler descriptor failed due "
-                                         "to: Invalid VkImageView: 0xbaadbeef");
+                                         "to: Invalid VkImageView:");
 
     ASSERT_NO_FATAL_FAILURE(InitState());
     VkDescriptorPoolSize ds_type_count = {};