add bazel7 for comparison, set -x

Author: rickeylev

.bazelci/presubmit.yml

@@ -91,7 +91,7 @@ buildifier:
 matrix:
   platform:
     - windows
-  bazel: [8.*]
+  bazel: [7.*, 8.*]
 tasks:
   # Keep in sync with .bcr/presubmit.yml
   bcr_tests:

examples/bzlmod/tests/version_test.sh

@@ -15,6 +15,7 @@
 
 
 set -o errexit -o nounset -o pipefail
+set -x
 
 # VERSION_PY_BINARY is a space separate list of the executable and its main
 # py file. We just want the executable.