The additional-commandline-arguments functionality in Chisel does not work with the way Metals works for VSCode's TestExplorer UI, and as a result we have not been able to use VSCode's Test Explorer prior to this fix, which creates an environment variable to disable the command line argument extension functionality.

Type of Improvement

• Internal or build-related (includes code refactoring/cleanup)

Release Notes

• VSCode's Metal's Test Explorer UI can now run tests when the CHISEL_ARGUMENT_EXTENSIONS environment variable is set to DISABLE

Reviewer Checklist (only modified by reviewer)

• Did you add the appropriate labels? (Select the most appropriate one based on the "Type of Improvement")
• Did you mark the proper milestone (Bug fix: 3.5.x, 3.6.x, or 5.x depending on impact, API modification or big change: 6.0)?
• Did you review?
• Did you check whether all relevant Contributor checkboxes have been checked?
• Did you do one of the following when ready to merge:
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  • Merge: Ensure that contributor has cleaned up their commit history, then merge with Create a merge commit.