ci: disable workaround for LuaJIT profiling tests on aarch64 runners

Disable workaround for LuaJIT profiling tests on aarch64 runners due to
the following error:

    mount: /tmp/luajit-test-vardir: mount failed: Operation not permitted

Looks like it happens because our aarch64 runners are LXD containers.

NO_DOC=ci
NO_TEST=ci
NO_CHANGELOG=ci