default.xml: update upstream revisions and delete ovmf patches

Update upstream revisions.
The following patches are now in oe-core so we can delete them:
 - ovmf/0001-edk2-BaseTools-gcc12.patch
 - ovmf/0002-edk2-LZMA-gcc12.patch

Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>