test: fix flaky box-luatest/gh_7917_log_row_on_recovery_error_test

The test fails with:

  master | 2022-11-11 09:03:32.093 [4128822] main/103/default.lua F>
  can't initialize storage: unlink, called on fd 30, aka unix/:(socket),
  peer of unix/:(socket): Address already in use

Looks like it happens, because both test cases share the socket path.
The fix is the same as in commit 3f86cd04 ("test: fix flaky
'test_ignore_with_force_recovery'") - use different socket paths.

Follow-up commit b2dab5f4 ("memtx: log bad row on snapshot recovery
error").

NO_DOC=test fix
NO_CHANGELOG=test fix

(cherry picked from commit 3d3e9dea)