fix: ONNX model shape inference cannot handle batch with shape [-1]

[memoryz]

Related Issues/PRs

#1902

What changes are proposed in this pull request?

Add support in ONNX model shape inference when the input batch has shape [-1].

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• I have written tests (not required for typo or doc fix) and confirmed the proposed feature/bug-fix/change works.

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[github-actions]

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[memoryz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

@svotaw the root cause of issue #1902 is that the shape inference code throws an error when the input batch looks like a one-dimensional array. I'm not sure why the original implementation throws "Image batch is not a sequence" error, but this error causes the code to fail when the input batch is one-dimensional.

[codecov-commenter]

Codecov Report

Merging #1906 (5c5429b) into master (13afff6) will decrease coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1906      +/-   ##
==========================================
- Coverage   86.82%   86.70%   -0.12%     
==========================================
  Files         301      301              
  Lines       15596    15596              
  Branches      815      815              
==========================================
- Hits        13541    13523      -18     
- Misses       2055     2073      +18     

Impacted Files	Coverage Δ
...om/microsoft/azure/synapse/ml/onnx/ONNXUtils.scala	76.51% <100.00%> (+0.67%)	⬆️

... and 8 files with indirect coverage changes

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[memoryz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

@svotaw please take a look at the changes.

[memoryz]

@mhamilton723 please merge. The fix was verified by customer.