support all with tag_filter to run all shapes (#29864)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29864
This diff make `all` as a reserved keyword for tag_filter. When `all` is passed from user, it will run all the supported shapes.
Test Plan:
```
buck run //caffe2/benchmarks/operator_benchmark/pt:add_test -- --iterations 1 --tag_filter all
# ----------------------------------------
# PyTorch/Caffe2 Operator Micro-benchmarks
# ----------------------------------------
# Tag : all
# Benchmarking PyTorch: add
# Mode: Eager
# Name: add_M8_N32_K256_cpu
# Input: M: 8, N: 32, K: 256, device: cpu
Forward Execution Time (us) : 6798.688
...
Reviewed By: hl475
Differential Revision: D18520249
fbshipit-source-id: 4d55af9f46f89b2fe8842e1a00dfa8e5acaf4fa2
