rpm: update 4.19.1.1 -> 4.20.0

rpm: update 4.19.1.1 -> 4.20.0

With this release, as expected, deprecated openpgp support
has been fully removed and replaced with sequoia:
https://github.com/rpm-software-management/rpm-sequoia/

Alas, it's written in rust, and has no recipe, so for now
signing rpm packages has to be disabled.

Remove package name parameter to %prep in source archiving, as it's
been dropped in the new rpm, and wasn't needed to begin with.

Drop 0001-perl-disable-auto-reqs.patch
(files removed upstream).

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>