Merge tag 'migration-20230601-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (20230601)

Hi

In this series:
- improve background migration (fiona)
- improve vmstate failure states (vladimir)
- dropped all the RDMA cleanups

Please, apply.

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# gpg: Signature made Thu 01 Jun 2023 04:38:50 PM PDT
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [unknown]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20230601-pull-request' of https://gitlab.com/juan.quintela/qemu

:
  migration: stop tracking ram writes when cancelling background migration
  migration: restore vmstate on migration failure
  migration: switch from .vm_was_running to .vm_old_state
  runstate: drop unused runstate_store()
  migration: never fail in global_state_store()
  runstate: add runstate_get()

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>