test: update test-run (no recursive submodules)

This commit updates test-run with an update of tarantool-python, which
eliminates the test-run submodule from tarantool-python. In other words,
we have no test-run submodule inside test-run anymore.

The goal is to don't confuse luacheck with old revisions of test-run /
tarantool-python code and to make recursive clone faster. See [1] and
[2] for details.

[1]: https://github.com/tarantool/test-run/pull/268
[2]: https://github.com/tarantool/tarantool-python/commit/dccf18fd07ac684195fdd386d2a5285b9582d380

.luacheckrc

@@ -30,7 +30,6 @@ include_files = {
 
 exclude_files = {
     "build/**/*.lua",
-    "test-run/**/*.lua",
     "test/app/*.test.lua",
     "test/box/*.test.lua",
     "test/engine/*.test.lua",

test-run @ d775fd92

-Subproject commit 72f8b89332b552cf20b2143e6dae7fe5042a9f79
+Subproject commit d775fd922f7303b58b63f07244298f8db259b754