FP8 roofline support (#592)

Adding FP8 datatype to roofline feature in rocprof-compute on MI300-based systems.
FP8 now shows in terminal output and roofline csv, and outputs a standalone PDF.

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Signed-off-by: Carrie Fallows <Carrie.Fallows@amd.com>

docs/how-to/profile/mode.rst

@@ -441,9 +441,9 @@ successfully.
 
 .. note::
 
-   ROCm Compute Profiler generates two roofline outputs to organize results and reduce
-   clutter. One chart plots FP32/FP64 performance while the other plots I8/FP16
-   performance.
+   ROCm Compute Profiler generates three roofline outputs to organize results and reduce
+   clutter. One chart plots FP32/FP64 performance, one plots I8/FP16
+   performance, and the other plots FP8 performance.
 
 The following image is a sample ``empirRoof_gpu-0_int8_fp16.pdf`` roofline
 plot.