[SYCL] Coverity scan fixes for #17380 (#18133)

Changes in #17380 introduced some Coverity detected issues. This commit
fixes the following issues:
1. Removes noexcept from get_bin_image_ref as it can now potentially
throw through std::variant interfaces.
2. Adheres to rule-of-three in ManagedDeviceGlobalsRegistry and
ManagedDeviceBinaries.

Signed-off-by: Larsen, Steffen <[email protected]>

Author: steffenlarsen

sycl/source/detail/device_image_impl.hpp

@@ -66,6 +66,9 @@ class ManagedDeviceGlobalsRegistry {
 
   ManagedDeviceGlobalsRegistry(const ManagedDeviceGlobalsRegistry &) = delete;
 
+  ManagedDeviceGlobalsRegistry &
+  operator=(const ManagedDeviceGlobalsRegistry &) = delete;
+
   ~ManagedDeviceGlobalsRegistry() {
     try {
       unregisterDeviceGlobalsFromContext();
@@ -128,6 +131,8 @@ class ManagedDeviceBinaries {
 
   ManagedDeviceBinaries(const ManagedDeviceBinaries &) = delete;
 
+  ManagedDeviceBinaries &operator=(const ManagedDeviceBinaries &) = delete;
+
   ~ManagedDeviceBinaries() {
     try {
       ProgramManager::getInstance().removeImages(MBinaries);
@@ -518,7 +523,7 @@ class device_image_impl {
     return MProgram;
   }
 
-  const RTDeviceBinaryImage *const &get_bin_image_ref() const noexcept {
+  const RTDeviceBinaryImage *const &get_bin_image_ref() const {
     return std::get<const RTDeviceBinaryImage *>(MBinImage);
   }