ci-build-checks.yaml workflow failing during testing for changes

[mhucka]

The checks that should be performed by ci-build-checks.yaml are not being performed because there is a failure during the call to gh. Here is an example from the logs (this taken from https://github.com/tensorflow/quantum/actions/runs/17313928572/job/49153324064?pr=888):

gh pr view https://api.github.com/repos/tensorflow/quantum/pulls/888 --json files --jq '.files | .[].path'
failed to run git: fatal: not a git repository (or any of the parent directories): .git

[mhucka]

PR #892 will revert this back to before the significant changes to the workflow were made.