qemu: Split the qemu package

Currently all files as below packaged into one package such as
qemu-7.2.0-*.rpm. After the qemu package installed on the target,
it will take up about 464M which includes not only the one matches
the arch of the target but aslo all available built qemu targets
which set by QEMU_TARGETS.

 # ls tmp-glibc/work/core2-64-wrs-linux/qemu/7.2.0-r0/image/usr/bin/
 qemu-aarch64  qemu-img          qemu-mips64el   qemu-ppc64
 qemu-sh4    qemu-system-loongarch64  qemu-system-ppc      qemu-system-x86_64
 qemu-arm      qemu-io           qemu-mipsel     qemu-ppc64le
 qemu-storage-daemon  qemu-system-mips         qemu-system-ppc64
 qemu-x86_64 qemu-edid     qemu-loongarch64  qemu-mips.real
 qemu-pr-helper  qemu-system-aarch64  qemu-system-mips64
 qemu-system-riscv32 qemu-ga       qemu-mips         qemu-nbd
 qemu-riscv32    qemu-system-arm      qemu-system-mips64el
 qemu-system-riscv64 qemu-i386     qemu-mips64       qemu-ppc
 qemu-riscv64    qemu-system-i386     qemu-system-mipsel qemu-system-sh4

Split the qemu package into qemu-7.2.0-*.rpm, qemu-system-*.rpm,
qemu-user-*.rpm and etc. And let user can only choose the corresponding
qemu arch package they want to install should ease the concerns who
cares much about the size in embedded device as it decreases the qemu rpm
(qemu-7.2.0*.rpm) size from about 65M to about 19M and the size of the
extracted qemu RPM decreased from about 464M to about 248M.

For the users who want to install all arch packages, they can install
qemu-system-all and qemu-user-all to meet their need.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>