Merge tag 'migration-20240917-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration pull request for 9.2

- Fabiano's patch to move two tests to slow tests.
- Peter's patch to fix qatzip builds
- Stefan's multifd-zstd fix on unsigned diff comparisons
- Fea's bug fix to consistently use memattrs when map() address space
- Fabiano's bug fix on multifd race condition against receivedmap

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* tag 'migration-20240917-pull-request' of https://gitlab.com/peterx/qemu:
  migration/multifd: Fix rb->receivedmap cleanup race
  migration/savevm: Remove extra load cleanup calls
  softmmu/physmem.c: Keep transaction attribute in address_space_map()
  migration/multifd: Fix loop conditions in multifd_zstd_send_prepare and multifd_zstd_recv
  migration/multifd: Fix build for qatzip
  tests/qtest/migration: Move a couple of slow tests under g_test_slow

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>