WIP: add CACHE to the version and path definition in AthGeneration/externals/.cmake

Ewelina Maria Lobodzinskarequested to merge
ewelina/athena:21.6-mp into 21.6

as discussed here: !26742 (comment 2961587) the CACHE was added !26742 (comment 2961587)

Edited by Ewelina Maria Lobodzinska

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