Add find_dependency(CUDAToolkit) to caliper-config.cmake.in

[michaelmckinsey1]

Without this change, applications that do not find the cupti target will incur the following cmake configuration error.

1 error found in build log:
     98     -- Kripke: Using external CAMP
     99     -- Kripke: Setting CAMP_HAVE_CUDA
     100    -- Caliper support is TRUE
     101    -- Kripke selected default architecture: 'CUDA'
     102    -- Kripke selected default layout:       'DGZ'
     103    -- Configuring done (5.9s)
  >> 104    CMake Error at /usr/WS1/mckinsey/bp_cuptihackathon/wkp-fail/spack/o
            pt/spack/linux-sapphirerapids/caliper-master-ngq5qtesxcpkhloxgp5ack
            czyt323vle/share/cmake/caliper/caliper-targets.cmake:61 (set_target
            _properties):
     105      The link interface of target "caliper" contains:
     106    
     107        CUDA::cupti
     108    
     109      but the target was not found.  Possible reasons include:
     110