Update local spack packages and move them to radiuss-spack-configs

[adrienbernede]

Description

RAJAPerf has 2 local Spack packages: Camp and RAJAPerf.

• The Camp package is an outdated duplicate of the ones also used by RAJA and Umpire and now shared in radiuss-spack-configs (https://github.com/LLNL/radiuss-spack-configs/tree/main/packages).
• The RAJAPerf package is unique, it does not exist in the upstream Spack. Still, it is based upon an outdated version of RAJA package and should be actualized.

Actions needed

Updating the local packages and move them to radiuss-spack-configs

• The Camp package as implemented in RAJAPerf does not bring any additional element: we could use the one in radiuss-spack-configs directly.
• The RAJAPerf package is still a "CMakePackage", we should convert it to "CachedCMakePackage", using the new (shared) RAJA package as an example. In particular, this will allow to share a good part of the implementation using the new routines defined in the shared Camp package.