tool: add detector for multiple new reinitializers #1866

Job	Run time
tests (ubuntu-latest, unit, 3.8)	48s
tests (ubuntu-latest, unit, 3.12)	46s
tests (ubuntu-latest, integration, 3.8)	3m 8s
tests (ubuntu-latest, integration, 3.12)	3m 20s
tests (ubuntu-latest, tool, 3.8)	51s
tests (ubuntu-latest, tool, 3.12)	53s
tests (windows-2022, unit, 3.8)	2m 4s
tests (windows-2022, unit, 3.12)	1m 32s
tests (windows-2022, integration, 3.8)	3m 34s
tests (windows-2022, integration, 3.12)	2m 58s
tests (windows-2022, tool, 3.8)	2m 40s
tests (windows-2022, tool, 3.12)	2m 42s
coverage	10s
	25m 26s

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