When converting a sparse COO matrix to a dense matrix using af::dense, the CUDA, oneAPI, and openCL kernels where invoking the coo2dense kernel with incorrect dimensions which was only observable for sparse arrays with nnz greater than 1024 (CUDA) and 8192 (oneAPI/openCL). This tests checks this.

Description

Additional information about the PR answering following questions:

• Is this a new feature or a bug fix?: Adds a test
• Why these changes are necessary: Tests uncovered case
• Potential impact on specific hardware, software or backends: None
• New functions and their functionality: None
• Can this PR be backported to older versions?: Yes
• Future changes not implemented in this PR.: None

Tests pull request #3583

Changes to Users

• Additional options added to the build: None
• No action required by the user

Checklist

• Rebased on latest master
• Code compiles
• Tests pass
• Functions added to unified API
• Functions documented