aws: adding temp stage to unblock python pipelines

Python pipelines are currently failing after CSP specific builds were introduced. The containerize stage is common across all languages but the compile stage is specific to each language. The MR introduced a dependency to the containerize stage for the csp specific build, which causes the pipeline to fail even if the stage is not used. A temporary stage was added to python projects so the pipeline will not return an error due to a missing stage.