Build: Set bwc builds to always set snapshot (#26704)
Build: Set bwc builds to always set snapshot (#26704)

This commit enforces bwc builds always generate snapshot versions, even
when testing release versions in CI.

closes #26702

strapdata/elassandra,vroyer/elasticassandra,vroyer/elassandra,vroyer/elassandra,vroyer/elasticassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elasticassandra