Merge tag 'pull-more-8.2-fixes-011223-2' of https://gitlab.com/stsquad/qemu into...

Flaky avocado tests, gdbstub and gitlab tweaks

  - gdbstub, properly halt when QEMU is having IO issues
  - convert skipIf(GITLAB_CI) to skipUnless(QEMU_TEST_FLAKY_TESTS)
  - tag sbsa-ref tests as TCG only
  - build the correct microblaze for avocado-system-ubuntu
  - add optional flaky tests job to CI

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* tag 'pull-more-8.2-fixes-011223-2' of https://gitlab.com/stsquad/qemu:
  gitlab: add optional job to run flaky avocado tests
  gitlab: build the correct microblaze target
  tests/avocado: tag sbsa tests as tcg only
  docs/devel: rationalise unstable gitlab tests under FLAKY_TESTS
  gdbstub: use a better signal when we halt for IO reasons

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