Kernel: Remove pledge syscall from the big lock

This already does all its dangerous work inside
`with_mutable_protected_data()`.

Author: AtkinsSJ

Kernel/API/Syscall.h

@@ -133,7 +133,7 @@ enum class NeedsBigProcessLock {
     S(perf_event, NeedsBigProcessLock::Yes)                 \
     S(perf_register_string, NeedsBigProcessLock::Yes)       \
     S(pipe, NeedsBigProcessLock::No)                        \
-    S(pledge, NeedsBigProcessLock::Yes)                     \
+    S(pledge, NeedsBigProcessLock::No)                      \
     S(poll, NeedsBigProcessLock::Yes)                       \
     S(posix_fallocate, NeedsBigProcessLock::No)             \
     S(prctl, NeedsBigProcessLock::Yes)                      \

Kernel/Syscalls/pledge.cpp

@@ -11,7 +11,7 @@ namespace Kernel {
 
 ErrorOr<FlatPtr> Process::sys$pledge(Userspace<Syscall::SC_pledge_params const*> user_params)
 {
-    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
+    VERIFY_NO_PROCESS_BIG_LOCK(this);
     auto params = TRY(copy_typed_from_user(user_params));
 
     if (params.promises.length > 1024 || params.execpromises.length > 1024)