Backport packages from questing to server-backports PPA for 22.04 and 24.04

[Bryce Harrington]

Backport the following packages to 22.04 and 24.04 for the server-backports PPA for questing:

* meson
* dpdk
* edk2
* libslirp
* libvirt
* libvirt-python
* openvswitch
* qemu
* rdma-core
* seabios
* spice
* spice-protocol
* spice-vdagent
* virglrenderer
* virt-manager

Process to follow:

[Prep Builds]
* Initiate new backport cycle (Post-FF of prior cycle)
  - Steps 1-5a in Readme.md
  - Sets up new branch forks
* Rebase branches and trigger first build
  - Steps 5b and 5c in Readme.md
  - For qemu and libvirt especially, spend some time upfront reviewing the Ubuntu delta and the past backport work.
* Review status of uploaded recipes in experimental
  - Add tasks to Soon for recipe, dependency, and build failures
  - Plan time to work through each individually (step 5*)
* For each package in the PPA:
  - Check installation in focal
    $ sudo apt-get install ${pkg}
  - Check installation in jammy
    $ sudo apt-get install ${pkg}
  - Identify any installation-time errors

[Finalize and Release Builds]
* Once all are good, copy them to normal PPA
  - Step 6 in Readme.md
* Push rebase branches to main
  - Step 7 in Readme.md
* Switch to final branch names
  - Step 8 in Readme.md
* Update LP recipes using update-all.sh
  - Step 9 in Readme.md
* Delete the -experimental recipes
  - Step 10 in Readme.md
* For each package in the PPA verify installation, on both LTS's
  - Identify any installation-time errors for followup
* Write up validation report

[Heinrich Schuchardt (xypron)]

Hello Bryce,

On riscv64 OpenSBI is a firmware dependency of QEMU (like SeaBIOS on x86). Debian QEMU packaging has been changed to use the opensbi package and not a git submodule of QEMU. It should be included in the list of backported dependencies.

Best regards

Heinrich