Don't autoload functions too eagerly during macroexpansion.

Don't autoload functions too eagerly during macroexpansion.
* lisp/emacs-lisp/macroexp.el (macroexp--expand-all): Only autoload
a function if there's a clear indication that it has a compiler-macro.
* lisp/emacs-lisp/byte-run.el (defun-declarations-alist, defmacro, defun)
(macro-declarations-alist): Add arglist to declaration functions.
(defun-declarations-alist): Add `obsolete' and `compiler-macro'.
* lisp/emacs-lisp/cl-seq.el (cl-member, cl-assoc):
* lisp/emacs-lisp/cl-lib.el (cl-list*, cl-adjoin):
* lisp/emacs-lisp/cl-extra.el (cl-get): Use the new `declare' statement.
Also add autoload to find the compiler macro.
* lisp/emacs-lisp/cl-macs.el (eql) [compiler-macro]: Remove.
(cl--compiler-macro-member, cl--compiler-macro-assoc)
(cl--compiler-macro-adjoin, cl--compiler-macro-list*)
(cl--compiler-macro-get): New functions, replacing calls to
cl-define-compiler-macro.
(cl-typep) [compiler-macro]: Use macroexp-let².