chore: fix C lint errors (issue #6502)

[sahilk45]

Resolves #6502

Description

What is the purpose of this pull request?

This PR fixes the C linting error related to an uninitialized variable in the dabs2 benchmark length test file. The fix replaces variable-length arrays with dynamically allocated memory to ensure proper initialization and memory management.

Changes made:

• Replaced VLAs with malloc-allocated arrays
• Added proper memory allocation checks
• Added memory cleanup with free() calls
• Maintained the same functionality as the original code

This pull request:

• Fixes the C linting error related to an uninitialized variable in the dabs2 benchmark length test file.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves Fix C lint errors #6502

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

Maintained the same functionality as the original code

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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Coverage Report

Package	Statements	Branches	Functions	Lines
math/strided/special/dabs2	$\color{green}374/374$ $\color{green}+100.00\%$	$\color{green}15/15$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}374/374$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.