[SYCL][NFC] Fix Coverity hits (#19882)

This is a cherry-pick of #19807

Patch-by: Sergey Semenov <[email protected]>

Author: AlexeySachkov

sycl/source/detail/device_binary_image.hpp

@@ -250,7 +250,7 @@ class RTDeviceBinaryImage {
 protected:
   sycl_device_binary get() const { return Bin; }
 
-  sycl_device_binary Bin;
+  sycl_device_binary Bin = nullptr;
 
   ur::DeviceBinaryType Format = SYCL_DEVICE_BINARY_TYPE_NONE;
   RTDeviceBinaryImage::PropertyRange SpecConstIDMap;

sycl/source/detail/global_handler.cpp

@@ -280,7 +280,9 @@ void GlobalHandler::releaseDefaultContexts() {
 // For Linux, early shutdown is here, and late shutdown is called from
 // a low priority destructor.
 struct StaticVarShutdownHandler {
-
+  StaticVarShutdownHandler(const StaticVarShutdownHandler &) = delete;
+  StaticVarShutdownHandler &
+  operator=(const StaticVarShutdownHandler &) = delete;
   ~StaticVarShutdownHandler() {
     try {
 #ifdef _WIN32