Add a tool to generate a time chart from an instrumentation file

[negiyas]

This PR provides a tool to generate a time chart figure from outputs generated by applications compiled by onnx-mlir with the "--InstrumentReportTime" option.

Users typically use utils/make-timechart.py with an instrumentation file. An output file in png format is generated. For example ./utils/make-timechart.py resnet50-v2-7.inst generates resnet50-v2-7.png

The main graph shows a single folded time line for showing elapsed time of executed operations.
The Y-axis shows the beginning time of each horizontal line, and the X-axis shows time offsets to be added to the Y-axis.

The legend shows the total execution time and number of calls of each operation. As default, operations occupying 1.0%+ of execution time have independent legends, and other operations has a common "Other" legend.

Any comments and design requests are very welcome.

The following is an example scenario to compile, build, run a module and generate its timechart.

$ ./build/Debug/bin/onnx-mlir  --shapeInformation=-1:64  -mcpu=z16 --mtriple=s390x-ibm-loz --parallel --O3 --maccel=NNPA  --instrument-stage=ZHigh --instrument-ops=onnx.*,zhigh.* --InstrumentBeforeOp --InstrumentAfterOp --InstrumentReportTime --EmitLib resnet50-v2-7.onnx
$ ONNX_MLIR_HOME=./build/Debug utils/RunONNXModel.py --shape-info=-1:64 --load-so resnet50-v2-7.so > resnet50-v2-7.inst
$ head resnet50-v2-7.inst
==START-REPORT==
==PERF-REPORT==, onnx.Constant, NOTSET, before, 0.000007, 0.000007
==PERF-REPORT==, onnx.Constant, NOTSET, after, 0.000001, 0.000008
==PERF-REPORT==, onnx.Constant, NOTSET, before, 0.000001, 0.000009
==PERF-REPORT==, onnx.Constant, NOTSET, after, 0.000000, 0.000009
==PERF-REPORT==, onnx.Constant, NOTSET, before, 0.000001, 0.000010
==PERF-REPORT==, onnx.Constant, NOTSET, after, 0.000000, 0.000010
==PERF-REPORT==, onnx.Constant, NOTSET, before, 0.000000, 0.000010
==PERF-REPORT==, onnx.Constant, NOTSET, after, 0.000001, 0.000011
==PERF-REPORT==, onnx.Constant, Initializer_reshape_attr_tensor430, before, 0.000000, 0.000011
$ ./utils/make-timechart.py resnet50-v2-7.inst

[AlexandreEichenberger]

LGTM,
please confirm that help is provided if I type python make-time chart.py -h?
Looking forward to use this tool, thanks