Merge tag 'pull-maintainer-9.1-rc1-300724-1' of https://gitlab.com/stsquad/qemu into...

Minor bug fixes and documentation cleanups:

  - display packages in CI builds to catch changes
  - stop compiler complaining about exec stacks in test cases
  - stop loongarch compiler complaining about rwx in test cases
  - improve docs on running TCG tests
  - remove old unneeded avocado test for memory callback testing
  - move test plugins into tcg testing dir
  - clean-up and move plugin documentation to emulation section
  - remove dead code from cache modelling plugin
  - add compatibility workaround for lockstep plugin
  - make some noise when building contrib plugins

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* tag 'pull-maintainer-9.1-rc1-300724-1' of https://gitlab.com/stsquad/qemu:
  plugin/loader: handle basic help query
  contrib/plugins: add compat for g_memdup2
  contrib/plugins: be more vocal building
  contrib/plugins/cache.c: Remove redundant check of l2_access
  docs: split TCG plugin usage from devel section
  tests/tcg: move test plugins into tcg subdir
  tests/avocado: remove tcg_plugins virt_mem_icount test
  docs/devel: document how to run individual TCG tests
  docs/devel: update the testing introduction
  tests/tcg: update README
  tests/tcg/loongarch64: Use --no-warn-rwx-segments to link system tests
  tests/tcg: Use --noexecstack with assembler files
  gitlab: display /packages.txt in build jobs
  gitlab: record installed packages in /packages.txt in containers

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