support for Valgrind #4085
Description
Valgrind is a very powerful tool for detecting memory leaks or still reachable memory, it also gives you errors and warnings about uninitialised values created by a heap allocation.
The output (.txt file) is kinda simillar to the outputs from the sanitizers that are allready suported (but i have often the problem that those sanitizers do not catch everything)
https://valgrind.org/docs/manual/quick-start.html
https://stackoverflow.com/questions/5134891/how-do-i-use-valgrind-to-find-memory-leaks