Caliper v2.8.0

Caliper v2.8.0 brings improvements and new functionality, including

• AMD ROCm/HIP activity profiling and tracing with the roctracer service and the rocm-activity-profile and rocm-activity-report ConfigManager configs
• Collecting statistics for the Umpire memory manager with the umpire.allocators and umpire.totals ConfigManager options
• New cuda.gputime and rocm.gputime ConfigManager options to include GPU time metrics in most profiling configs
• MPI message size and count metrics with the mpi.message.size and mpi.message.count ConfigManager options
• Various internal optimizations and build system improvements