Add PAPI counter calls

### Contact Details

@andrewcoughtrie

### Are there any linked Issues or Pull Requests?

_No response_

### Brief description

It would be useful to have calls to the PAPI library for hardware counter calls.

### Further details of the issue.

_No response_

Start by locating Vernier's profiler instrumentation and platform-specific integration points, then review how PAPI hardware counters are initialized, queried, and finalized. The work is done when the project exposes PAPI counter calls in a defined, tested way without disrupting existing profiling on supported HPC platforms.

Written by the indexing model from the issue text.