let Pointer be nothrow-move-constructible (#47331)

Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/47331

Reviewed By: Gownta

Differential Revision: D65271354

packages/react-native/ReactCommon/jsi/jsi/jsi.cpp

@@ -258,7 +258,7 @@ std::u16string Runtime::utf16(const String& str) {
   return convertUTF8ToUTF16(utf8Str);
 }
 
-Pointer& Pointer::operator=(Pointer&& other) {
+Pointer& Pointer::operator=(Pointer&& other) noexcept {
   if (ptr_) {
     ptr_->invalidate();
   }

packages/react-native/ReactCommon/jsi/jsi/jsi.h

@@ -418,7 +418,7 @@ class JSI_EXPORT Runtime {
 // Base class for pointer-storing types.
 class JSI_EXPORT Pointer {
  protected:
-  explicit Pointer(Pointer&& other) : ptr_(other.ptr_) {
+  explicit Pointer(Pointer&& other) noexcept : ptr_(other.ptr_) {
     other.ptr_ = nullptr;
   }
 
@@ -428,7 +428,7 @@ class JSI_EXPORT Pointer {
     }
   }
 
-  Pointer& operator=(Pointer&& other);
+  Pointer& operator=(Pointer&& other) noexcept;
 
   friend class Runtime;
   friend class Value;