Set execute permission bit for copied App binary (#1185)

* Copy binary permission bits

* Add news frag

Author: zsambokiandras

doc/newsfragments/3234_changed.fix_app_binary_permissions.rst

@@ -0,0 +1 @@
+Copy permission bits for the copied binary in App.

testplan/testing/multitest/driver/app.py

@@ -300,6 +300,7 @@ def binary(self) -> str:
 
             if self.cfg.binary_strategy == "copy":
                 shutil.copyfile(self.resolved_bin, target)
+                shutil.copymode(self.resolved_bin, target)
                 self._binary = target
             elif self.cfg.binary_strategy == "link" and not IS_WIN:
                 os.symlink(os.path.abspath(self.resolved_bin), target)