AK+Kernel: Suppress clang-tidy warnings from the cert-* category

cert-dcl50-cpp: No variadic functions, suppressed in RefCounted and
ThreadSafeRefCounted for implementing the magic one_ref_left and
will_be_destroyed functions.

cert-dcl58-cpp: No opening ::std, suppressed in the places we put names
in ::std to aid tools (move, forward, nullptr_t, align_val_t, etc).

AK/RefCounted.h

@@ -25,6 +25,7 @@ constexpr auto call_will_be_destroyed_if_present(const T* object) -> decltype(co
     return {};
 }
 
+// NOLINTNEXTLINE(cert-dcl50-cpp) variadic argument used to implement "is detected" pattern
 constexpr auto call_will_be_destroyed_if_present(...) -> FalseType
 {
     return {};
@@ -37,6 +38,7 @@ constexpr auto call_one_ref_left_if_present(const T* object) -> decltype(const_c
     return {};
 }
 
+// NOLINTNEXTLINE(cert-dcl50-cpp) variadic argument used to implement "is detected" pattern
 constexpr auto call_one_ref_left_if_present(...) -> FalseType
 {
     return {};

AK/StdLibExtras.h

@@ -21,7 +21,7 @@ constexpr auto round_up_to_power_of_two(T value, U power_of_two) requires(IsInte
 //
 // clang-format off
 #ifndef AK_DONT_REPLACE_STD
-namespace std {
+namespace std { // NOLINT(cert-dcl58-cpp) Names in std to aid tools
 
 // NOTE: These are in the "std" namespace since some compilers and static analyzers rely on it.
 

AK/Types.h

@@ -61,7 +61,7 @@ constexpr u64 TiB = KiB * KiB * KiB * KiB;
 constexpr u64 PiB = KiB * KiB * KiB * KiB * KiB;
 constexpr u64 EiB = KiB * KiB * KiB * KiB * KiB * KiB;
 
-namespace std {
+namespace std { //NOLINT(cert-dcl58-cpp) nullptr_t must be in ::std:: for some analysis tools
 using nullptr_t = decltype(nullptr);
 }
 

Kernel/Heap/kmalloc.h

@@ -28,7 +28,7 @@ private:
 
 // The C++ standard specifies that the nothrow allocation tag should live in the std namespace.
 // Otherwise, `new (std::nothrow)` calls wouldn't get resolved.
-namespace std {
+namespace std { // NOLINT(cert-dcl58-cpp) These declarations must be in ::std and we are not using <new>
 struct nothrow_t {
     explicit nothrow_t() = default;
 };

Kernel/Library/ThreadSafeRefCounted.h

@@ -22,6 +22,7 @@ constexpr auto call_will_be_destroyed_if_present(const T* object) -> decltype(co
     return {};
 }
 
+// NOLINTNEXTLINE(cert-dcl50-cpp) variadic argument used to implement "is detected" pattern
 constexpr auto call_will_be_destroyed_if_present(...) -> FalseType
 {
     return {};
@@ -34,6 +35,7 @@ constexpr auto call_one_ref_left_if_present(const T* object) -> decltype(const_c
     return {};
 }
 
+// NOLINTNEXTLINE(cert-dcl50-cpp) variadic argument used to implement "is detected" pattern
 constexpr auto call_one_ref_left_if_present(...) -> FalseType
 {
     return {};