use stackql-exec

remove unused

updated tests

Switch all Google test references from google.compute.instances
(stackql-integration-tests project, australia-southeast1-a zone) to
google.storage.buckets (stackql project, stackql-public-releases bucket).
Bucket properties (name, location, locationType) are stable and not
subject to instance lifecycle costs. Remove GOOGLE_ZONE variable
dependency throughout.

https://claude.ai/code/session_019CH6RrcMGtdUafvyVCKCHE

stackql serialises JSON keys alphabetically, so expected result strings
must use the same order (location, locationType, name) to pass deep
equality checks.

https://claude.ai/code/session_019CH6RrcMGtdUafvyVCKCHE

assert.js: replace JSON.stringify deep equality with key-sorted
comparison so JSON objects match regardless of key order.

stackql-assert-test.yml: hardcode GOOGLE_PROJECT=stackql in the
inline jsonnet test vars instead of pulling from the repo variable
(which still pointed at stackql-integration-tests).

https://claude.ai/code/session_019CH6RrcMGtdUafvyVCKCHE

…ns-AE07x

Replace Google Compute instance tests with stable GCS bucket resource