tests/docker: upgrade debian-all-test-cross to bookworm

This requires a few more tweaks than usual as:

  - the default sources format has changed
  - bring in python3-tomli from the repos
  - split base install from cross compilers
  - also include libclang-rt-dev for sanitiser builds

Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231029145033.592566-16-alex.bennee@linaro.org>
1 file changed