Sweeping !2354 from master to LCG_105-patches: CDash: use alias instead of machine name

To run the testing, add a comment with:

Bot test PACKAGE[ PACKAGE2 ...]|all in TOOLCHAIN|all [(only|also) for ARCH-LABEL-COMPILER-BUILDTYPE] please!

later followed by

Bot repeat please!

To ensure patches required for existing LCG branches are not lost, please add the respective labels: alsoTargeting:LCG_102-patches, alsoTargeting:master, etc.

added sweep:from master label

Adding original author @sailer as watcher.

added test-needed label

enabled an automatic merge when the pipeline for 32159487 succeeds

mentioned in commit 19604daa

merged

added sweep:ignore label