Everywhere: Move shared library checks into a common function

While we're at it, unify the various different conditions that are
scattered accross the codebase.

Userland/DevTools/Profiler/Process.cpp

@@ -5,6 +5,7 @@
  */
 
 #include "Process.h"
+#include <LibCore/File.h>
 
 namespace Profiler {
 
@@ -90,7 +91,7 @@ void LibraryMetadata::handle_mmap(FlatPtr base, size_t size, const String& name)
     } else {
         String path_string = path.to_string();
         String full_path;
-        if (path_string.ends_with(".so"sv))
+        if (Core::File::looks_like_shared_library(path_string))
             full_path = String::formatted("/usr/lib/{}", path);
         else
             full_path = path_string;