[rocprof-sys] Use fmt APIs to construct strings instead of JOIN (#2643)

## Motivation

With the introduction of the new logging system base on `spdlog` library, opportunity shows to replace `timemory` dependent JOIN implementation with `fmt` library `format` and `join` APIs, which are shipped as a part of `spdlog` lib

## Technical Details

Use `fmt` provided APIs to properly format and package strings.

projects/rocprofiler-systems/source/lib/rocprof-sys/library/coverage.cpp

@@ -239,7 +239,7 @@ post_process()
                 // if(get_debug() && get_verbose() >= 2)
                 if(true)
                 {
-                    auto _addr = TIMEMORY_JOIN("", "0x", std::hex, itr.address);
+                    auto _addr = fmt::format("0x{:x}", itr.address);
                     ofs << std::setw(8) << itr.count << "  " << std::setw(8) << _addr
                         << "  " << itr.source << "\n";
                 }