Add support for the Einsum operator

[mirza-halilcevic]

• Implement ONNX parsing support for the Einsum operator
• Resolves Einsum operator is unsupported migraphx-benchmark/AMDMIGraphX#92

[migraphx-bot]

Test	Batch	Rate new 7140ae	Rate old dc028d	Diff	Compare
torchvision-resnet50	64	1,713.92	1,489.70	15.05%	🔆
torchvision-resnet50_fp16	64	3,810.84	1,346.10	183.10%	🔆
torchvision-densenet121	32	1,453.97	1,440.50	0.94%	✅
torchvision-densenet121_fp16	32	2,435.42	2,416.72	0.77%	✅
torchvision-inceptionv3	32	883.32	881.27	0.23%	✅
torchvision-inceptionv3_fp16	32	1,412.36	1,406.66	0.41%	✅
cadene-inceptionv4	16	407.47	404.25	0.80%	✅
cadene-resnext64x4	16	413.99	410.23	0.92%	✅
slim-mobilenet	64	3,823.89	3,794.28	0.78%	✅
slim-nasnetalarge	64	97.06	94.95	2.22%	✅
slim-resnet50v2	64	1,652.06	1,620.87	1.92%	✅
bert-mrpc-onnx	8	589.65	591.10	-0.25%	✅
bert-mrpc-tf	1	289.94	289.30	0.22%	✅
pytorch-examples-wlang-gru	1	333.82	378.53	-11.81%	🔴
pytorch-examples-wlang-lstm	1	303.50	266.28	13.98%	🔆
torchvision-resnet50_1	1	453.79	369.37	22.86%	🔆
cadene-dpn92_1	1	245.35	233.66	5.00%	🔆
cadene-resnext101_1	1	189.30	189.16	0.07%	✅
onnx-taau-downsample	1	204.05	183.13	11.43%	🔆
dlrm-criteoterabyte	1	22.29	21.99	1.38%	✅
dlrm-criteoterabyte_fp16	1	41.63	41.43	0.47%	✅
agentmodel	1	6,211.60	6,337.70	-1.99%	✅
unet_fp16	2	33.74	33.63	0.33%	✅
resnet50v1_fp16	1	557.63	521.53	6.92%	🔆
resnet50v1_int8	1	463.51	452.53	2.43%	✅
bert_base_cased_fp16	64	620.97	620.67	0.05%	✅
bert_large_uncased_fp16	32	193.84	193.85	-0.01%	✅
bert_large_fp16	1	103.92	103.88	0.04%	✅
distilgpt2_fp16	16	1,187.47	1,187.83	-0.03%	✅
yolov5s	1	298.21	297.39	0.27%	✅
tinyllama	1	23.34	23.34	0.02%	✅
vicuna-fastchat	1	132.42	132.19	0.17%	✅
whisper-tiny-encoder	1	240.97	240.52	0.19%	✅
whisper-tiny-decoder	1	245.84	245.42	0.17%	✅

This build is not recommended to merge 🔴

[migraphx-bot]

     ✅ bert-mrpc-onnx: PASSED: MIGraphX meets tolerance

     ✅ bert-mrpc-tf: PASSED: MIGraphX meets tolerance

     ✅ pytorch-examples-wlang-gru: PASSED: MIGraphX meets tolerance

     ✅ pytorch-examples-wlang-lstm: PASSED: MIGraphX meets tolerance

     ✅ torchvision-resnet50_1: PASSED: MIGraphX meets tolerance

     ✅ cadene-dpn92_1: PASSED: MIGraphX meets tolerance

     ✅ cadene-resnext101_1: PASSED: MIGraphX meets tolerance

     ✅ dlrm-criteoterabyte: PASSED: MIGraphX meets tolerance

     ✅ agentmodel: PASSED: MIGraphX meets tolerance

     ✅ unet: PASSED: MIGraphX meets tolerance

     ✅ resnet50v1: PASSED: MIGraphX meets tolerance

     ✅ bert_base_cased_fp16: PASSED: MIGraphX meets tolerance

🔴bert_large_uncased_fp16: FAILED: MIGraphX is not within tolerance - check verbose output

     ✅ bert_large: PASSED: MIGraphX meets tolerance

     ✅ yolov5s: PASSED: MIGraphX meets tolerance

     ✅ tinyllama: PASSED: MIGraphX meets tolerance

     ✅ vicuna-fastchat: PASSED: MIGraphX meets tolerance

     ✅ whisper-tiny-encoder: PASSED: MIGraphX meets tolerance

     ✅ whisper-tiny-decoder: PASSED: MIGraphX meets tolerance

     ✅ distilgpt2_fp16: PASSED: MIGraphX meets tolerance

[codecov]

Codecov Report

Attention: Patch coverage is 98.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 91.92%. Comparing base (dc028dd) to head (7140ae2).
Report is 148 commits behind head on develop.

Files	Patch %	Lines
src/onnx/parse_einsum.cpp	98.91%	3 Missing ⚠️
src/lexing.cpp	93.75%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2772      +/-   ##
===========================================
+ Coverage    91.82%   91.92%   +0.10%     
===========================================
  Files          486      489       +3     
  Lines        18993    19275     +282     
===========================================
+ Hits         17440    17719     +279     
- Misses        1553     1556       +3     

☔ View full report in Codecov by Sentry.
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[causten]

Windows CI is failing. Seems like...
src\onnx\parse_einsum.cpp:516:21: error: use of undeclared identifier 'ssize_t'

[mirza-halilcevic]

Windows CI is failing. Seems like... src\onnx\parse_einsum.cpp:516:21: error: use of undeclared identifier 'ssize_t'

I replaced ssize_t with int64_t. Seems like it's still failing for some other reason. I don't have access to the logs though.

[causten]

I see the extended Jenkins tests run but they are not reflecting on this PR list. They all passed so I'm merging