Kernel: Add dedicated "ptrace" pledge promise

The vast majority of programs don't ever need to use sys$ptrace(),
and it seems like a high-value system call to prevent a compromised
process from using.

This patch moves sys$ptrace() from the "proc" promise to its own,
new "ptrace" promise and updates the affected apps.

Userland/functrace.cpp

@@ -112,7 +112,7 @@ static NonnullOwnPtr<HashMap<void*, X86::Instruction>> instrument_code()
 
 int main(int argc, char** argv)
 {
-    if (pledge("stdio proc exec rpath sigaction", nullptr) < 0) {
+    if (pledge("stdio proc exec rpath sigaction ptrace", nullptr) < 0) {
         perror("pledge");
         return 1;
     }