`IOFStreamMissingPositioning`: Improve performance #2869

Job	Run time
Run Guideline Recategorization tests	8s
Run release tests	10s
Prepare supported CodeQL environment matrix	6s
Run analysis report tests (2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4)	4m 38s
	5m 2s

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