Sync with Tramp 2.7.1

Sync with Tramp 2.7.1

* doc/misc/trampver.texi:
* lisp/net/trampver.el (tramp-version): Adapt Tramp versions.
(customize-package-emacs-version-alist): Add Tramp version
integrated in Emacs 30.1.

* lisp/net/tramp-compat.el:
* lisp/net/tramp-message.el (tramp-warning): Use `lwarn'.

* test/lisp/net/tramp-tests.el
(tramp--test-deftest-without-file-attributes): New defmacro.
(tramp-test18-file-attributes-without-file-attributes)
(tramp-test19-directory-files-and-attributes-without-file-attributes)
(tramp-test18-file-attributes-without-file-attributes)
(tramp-test42-utf8-without-file-attributes): New tests.