devtool upgrade: rebase override-only patches as well

There's a number of recipes (such as nettle or glib) which were upgraded
incorrectly due to rebasing only the default set of patches in main SRC_URI.
Native-only or musl-only patches were not handled, causing do_patch fails
and overall misery.

Unfortunately, this also necessitates aborting any incomplete rebases as
devtool needs to be able to return to the original branch to complete
the upgrade command.

Also, do not add devtool-patched-%version tags, as they are not used anywhere,
and it's unclear how to extend them to cover multiple override branches.

(From OE-Core rev: 00131cbc969f6a73caffe068fcb983287cbe577f)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>