test: bump test-run to version w/ updated luatest

Bump test-run to new version with the following improvements:

- Bump luatest to 0.5.7-24-g8de38b3 [1] [2]
- Add ignore_zero option to get_vclock [3]

[1] https://github.com/tarantool/test-run/pull/370
[2] https://github.com/tarantool/test-run/pull/368
[3] https://github.com/tarantool/test-run/pull/367

NO_DOC=testing stuff
NO_TEST=testing stuff
NO_CHANGELOG=testing stuff