[6.3] Fix rocprof-sys-sample cannot get GPU related tracing

[adjordje-amd]

After unloading the RCCL library, the library destructor triggers undefined behavior by invoking OnLoad function.
Disable the RCCL backend to avoid issues with the library destructor and undefined behavior.

[dgaliffiAMD]

Thanks, Aleks.
This does fix the original issue for the transpose example; rocprof-sys-sample --PTDH -I all -- ./transpose now includes "rocm-smi" samples. However, it seems to have introduced a new type failure for certain workloads. For example, when I run rocprof-sys-sample -PTDH -I all -v 2 -- ls -al, the trace fails to exit. We get stuck while tearing down:

[rocprof-sys][597260] Removing temporary file '/tmp/rocprofsys-ls-output/281783/sampling-597260.dat'...
[rocprof-sys][597260][0][rocprofsys_finalize] Finalized: 0.045335 sec wall_clock,    2.304 MB peak_rss,    2.359 MB page_rss, 0.010000 sec cpu_clock,   22.0 % cpu_util