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>

tests/test_profile_general.py

@@ -121,6 +121,7 @@ ROOF_ONLY_FILES = sorted(
     [
         "empirRoof_gpu-0_fp32_fp64.pdf",
         "empirRoof_gpu-0_int8_fp16.pdf",
+        "empirRoof_gpu-0_fp8.pdf",
         "pmc_perf.csv",
         "pmc_perf_0.csv",
         "pmc_perf_1.csv",