test(snuba): Run the new Snuba migration system in Travis (#20418)

Use the new Snuba migration system to migrate the database before running tests on Travis.
The old one will be deprecated and removed soon.

.travis.yml

@@ -93,7 +93,7 @@ start_snuba: &start_snuba |-
     -e CLICKHOUSE_PORT=9000 \
     getsentry/snuba
 
-  docker exec sentry_snuba snuba migrate
+  docker exec sentry_snuba snuba migrations migrate --force
 
 script:
   - make travis-test-$TEST_SUITE