The repo uses Cloud Source by default, but this API was removed for new customers, effective June 17, 2024. For this reason, the bootstrap-0 step fails (TF apply output):
Error: Request Enable Project Service "sourcerepo.googleapis.com" for project "prj-b-cicd-rsoy" returned error: failed to enable services: failed on request preconditions: googleapi: Error 403: Permission denied to enable service [sourcerepo.googleapis.com]

https://cloud.google.com/source-repositories/docs/reference/rest/
An alternative for the repository resource should be designed.
The repo uses Cloud Source by default, but this API was removed for new customers, effective June 17, 2024. For this reason, the bootstrap-0 step fails (TF apply output):
Error: RequestEnable Project Service "sourcerepo.googleapis.com" for project "prj-b-cicd-rsoy"returned error: failed to enable services: failed on request preconditions: googleapi: Error 403: Permission denied to enable service [sourcerepo.googleapis.com]https://cloud.google.com/source-repositories/docs/reference/rest/
An alternative for the repository resource should be designed.