Everywhere: Rename ASSERT => VERIFY

(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)

Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.

We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.

AK/NonnullRefPtr.h

@@ -72,42 +72,42 @@ public:
     ALWAYS_INLINE NonnullRefPtr(const T& object)
         : m_bits((FlatPtr)&object)
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
         const_cast<T&>(object).ref();
     }
     template<typename U>
     ALWAYS_INLINE NonnullRefPtr(const U& object)
         : m_bits((FlatPtr) static_cast<const T*>(&object))
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
         const_cast<T&>(static_cast<const T&>(object)).ref();
     }
     ALWAYS_INLINE NonnullRefPtr(AdoptTag, T& object)
         : m_bits((FlatPtr)&object)
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
     }
     ALWAYS_INLINE NonnullRefPtr(NonnullRefPtr&& other)
         : m_bits((FlatPtr)&other.leak_ref())
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
     }
     template<typename U>
     ALWAYS_INLINE NonnullRefPtr(NonnullRefPtr<U>&& other)
         : m_bits((FlatPtr)&other.leak_ref())
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
     }
     ALWAYS_INLINE NonnullRefPtr(const NonnullRefPtr& other)
         : m_bits((FlatPtr)other.add_ref())
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
     }
     template<typename U>
     ALWAYS_INLINE NonnullRefPtr(const NonnullRefPtr<U>& other)
         : m_bits((FlatPtr)other.add_ref())
     {
-        ASSERT(!(m_bits & 1));
+        VERIFY(!(m_bits & 1));
     }
     ALWAYS_INLINE ~NonnullRefPtr()
     {
@@ -170,7 +170,7 @@ public:
     [[nodiscard]] ALWAYS_INLINE T& leak_ref()
     {
         T* ptr = exchange(nullptr);
-        ASSERT(ptr);
+        VERIFY(ptr);
         return *ptr;
     }
 
@@ -253,7 +253,7 @@ private:
     ALWAYS_INLINE T* as_nonnull_ptr() const
     {
         T* ptr = (T*)(m_bits.load(AK::MemoryOrder::memory_order_relaxed) & ~(FlatPtr)1);
-        ASSERT(ptr);
+        VERIFY(ptr);
         return ptr;
     }
 
@@ -273,7 +273,7 @@ private:
             Kernel::Processor::wait_check();
 #endif
         }
-        ASSERT(!(bits & 1));
+        VERIFY(!(bits & 1));
         f((T*)bits);
         m_bits.store(bits, AK::MemoryOrder::memory_order_release);
     }
@@ -286,7 +286,7 @@ private:
 
     ALWAYS_INLINE T* exchange(T* new_ptr)
     {
-        ASSERT(!((FlatPtr)new_ptr & 1));
+        VERIFY(!((FlatPtr)new_ptr & 1));
 #ifdef KERNEL
         // We don't want to be pre-empted while we have the lock bit set
         Kernel::ScopedCritical critical;
@@ -301,7 +301,7 @@ private:
             Kernel::Processor::wait_check();
 #endif
         }
-        ASSERT(!(expected & 1));
+        VERIFY(!(expected & 1));
         return (T*)expected;
     }