Move box/ tests to engine/

test/box/indices_any_type.result

test/box/indices_any_type.test.lua

test/box/insert.result

test/box/insert.test.lua

test/box/iterator.result

test/box/iterator.test.lua

test/box/lua.result

test/box/lua.test.lua

test/box/misc.result

test/box/misc.test.lua

test/engine/crossjoin.result

test/engine/crossjoin.test.lua

test/engine/insert.result

test/engine/insert.test.lua

test/engine/iterator.result

test/engine/iterator.test.lua

test/engine/lua.result

test/engine/lua.test.lua

test/engine/misc.result

test/engine/misc.test.lua