Merge tag 'qtest-20250203-pull-request' of https://gitlab.com/farosas/qemu into staging

Merge tag 'qtest-20250203-pull-request' of https://gitlab.com/farosas/qemu into staging

Qtest pull request

- fw-cfg: DMA support and new vmcoreinfo test
- accel detection via QOM for non-KVM accels
- use virtio modern for vhost-user

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* tag 'qtest-20250203-pull-request' of https://gitlab.com/farosas/qemu:
  tests/qtest/vhost-user-test: Use modern virtio for vhost-user tests
  tests/qtest: Make qtest_has_accel() generic
  tests/qtest: Extract qtest_qom_has_concrete_type() helper
  tests/qtest/vmcoreinfo: add a unit test to exercize basic vmcoreinfo function
  tests/qtest/libqos: add DMA support for writing and reading fw_cfg files
  libqos/fw_cfg: refactor file directory iteraton to make it more reusable

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>