eval-and-compile: Strip symbol positions for eval but not for compile.

eval-and-compile: Strip symbol positions for eval but not for compile.

This fixes bug #61962.

* lisp/subr.el (safe-copy-tree): New function.

* lisp/emacs-lisp/bytecomp.el (byte-compile-initial-macro-environment): Amend
the entry for eval-and-compile to use safe-copy-tree and
byte-run-strip-symbol-positions for the eval part.

* doc/lispref/lists.texi (Building Lists): Document safe-copy-tree.

* etc/NEWS: Note the new function safe-copy-tree.