Draft: Projects: Fix missing Vc dependency of ROOT with LCG_104

Johannes Elmsheuserrequested to merge
elmsheus/athena:vc_20230816 into main

This MR fixes a missing Vc dependency of ROOT with LCG_104 in the AthSimulation project. More details in ATLINFR-5041.

Ideally this MR should be combined or comes after an update of atlasexternals that includes the MR atlasexternals!1039 (merged)

Keeping in Draft status until we can confirm that the Athena project or other projects will need a similar fix.

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