scripted-diff: modernize outdated trait patterns - values

See https://en.cppreference.com/w/cpp/types/is_enum for more details.

-BEGIN VERIFY SCRIPT-
sed -i -E 's/(std::[a-z_]+)(<[^<>]+>)::value\b/\1_v\2/g' $(git grep -l '::value' ./src ':(exclude)src/bench/nanobench.h' ':(exclude)src/minisketch' ':(exclude)src/span.h')
-END VERIFY SCRIPT-

src/sync.cpp

@@ -148,8 +148,8 @@ template <typename MutexType>
 static void push_lock(MutexType* c, const CLockLocation& locklocation)
 {
     constexpr bool is_recursive_mutex =
-        std::is_base_of<RecursiveMutex, MutexType>::value ||
-        std::is_base_of<std::recursive_mutex, MutexType>::value;
+        std::is_base_of_v<RecursiveMutex, MutexType> ||
+        std::is_base_of_v<std::recursive_mutex, MutexType>;
 
     LockData& lockdata = GetLockData();
     std::lock_guard<std::mutex> lock(lockdata.dd_mutex);