Feature/certificates in envars

Description

Related modules MR: ironbank-modules!50 (diffs)

Risk

Cosign signatures and/or verification break.

Rollback Plan

Roll forward with fix or roll back to previous commit.

Testing

Tested in IL5 production: ubi9-il5-test, downstream-test projects Additionally tested in Il2 prod for cds edge-case: https://repo1.dso.mil/dsop/ironbank-pipelines/pipelines-runner-dev/-/pipelines/2988421

pipeline1 testing: master: https://repo1.dso.mil/dsop/ironbank-pipelines/pipelines-runner-dev/-/pipelines/3033210 development: https://repo1.dso.mil/dsop/ironbank-pipelines/pipelines-runner-dev/-/pipelines/3033167 feature branch: https://repo1.dso.mil/dsop/ironbank-pipelines/pipelines-runner-dev/-/pipelines/3029996