[DOCS] Adding some doc on the benchmarks + requirements file (#285)

python/bench/README.md

@@ -0,0 +1,5 @@
+# Run the benchmarks
+
+Install the required dependencies via `pip install -r requirements-bench.txt` from the triton/python/bench folder.
+
+Run the benchmarks through `python3 bench/run.py`, this will produce an HTML report in a results folder.

python/bench/requirements-bench.txt

@@ -0,0 +1,2 @@
+pandas >= 1.3.3
+matplotlib >= 3.4.3