test-run: bump to new version

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

- Change default value for `vardir` option [1]
- Read default value for `vardir` option from env [1]

[1] tarantool/test-run#338

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

(cherry picked from commit 60abb06d)

test-run @ 9ccc40fa

-Subproject commit cb0eeab1de03c642d07866d22c852b9dacde6dac
+Subproject commit 9ccc40fad03a4707be751ed55578ea41b453feb6