docker(install): check qemu is installed

[crazy-max]

relates to https://github.com/docker/actions-toolkit/actions/runs/11893136762/job/33137504565#step:11:1112

 Error: Unable to locate executable file: qemu-system-x86_64. Please verify either the file path exists or the file can be found within a directory specified by the PATH environment variable. Also check the file mode to verify the file is executable.
          at Object.<anonymous> (/Users/runner/work/actions-toolkit/actions-toolkit/node_modules/@actions/io/src/io.ts:170:15)
          at Generator.next (<anonymous>)
          at fulfilled (/Users/runner/work/actions-toolkit/actions-toolkit/node_modules/@actions/io/lib/io.js:24:58)

[crazy-max]

Job canceled on macos-12 is expected today: actions/runner-images#10721