Apache Doris made the branch branch-1.2-lts protected. As a result, all pull requests for this branch should be checked before merging it.
However, the BE UT workflows doesn't support branch checks and they fail to check the pull requests for the branch branch-1.2-lts. The reason is that they download the wrong pre-built third-party libraries when they check the pull requests for branch-1.2-lts.
In #14533 , we run BE UT workflows periodically to share the cache with brand new pull requests. However, we don't need to save the cache when the unit tests doesn't run, otherwise it may occupy huge cache space and some useful caches will be evicted by GitHub.
Currently, we build the third-party libraries and release them automatically (See https://github.com/apache/doris-thirdparty/pull/13). We must make sure that the changes for third-party libraries are valid.
