Added DiagnosticTestIsVoid mapping class and criteria method for filt… #892

Job	Run time
Set CI/CD metadata	4s
Commit stage / Check file format	7s
Commit stage / Check Markdown format	6s
Commit stage / Scan secrets	5s
Commit stage / Scan dependencies	26s
Commit stage / Check English usage	6s
Commit stage / Count lines of code	9s
Test stage / Run Util Tests	23s
	1m 26s

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