Add BASOP_REFERENCE_BRANCH_PC to be used in basop-ci-branch-pc
The CI of basop-ci-branch-pc needs to use float-pc as BASOP reference branch.
WARNING! Gitlab maintenance operation scheduled for Saturday, 27 September 2025, from 07:00 AM to 4:00 PM GMT (09:00 AM to 6:00 PM CEST)
The CI of basop-ci-branch-pc needs to use float-pc as BASOP reference branch.