Kernel: Don't take LexicalPath as argument

LexicalPath is a big and heavy class that's really meant as a helper
for extracting parts of a path, not for storage or passing around.
Instead, pass paths around as strings and use LexicalPath locally
as needed.

Kernel/Syscalls/profiling.cpp

@@ -60,7 +60,7 @@ int Process::sys$profiling_disable(pid_t pid)
     // We explicitly unlock here because we can't hold the lock when writing the coredump VFS
     lock.unlock();
 
-    auto coredump = CoreDump::create(*process, LexicalPath { String::format("/tmp/profiler_coredumps/%d", pid) });
+    auto coredump = CoreDump::create(*process, String::formatted("/tmp/profiler_coredumps/%d", pid));
     coredump->write();
     return 0;
 }