Experiment: Let `SupportsDunderLT` return `object`. #10961

Job	Run time
Check stdlib with stubtest (ubuntu-24.04, 3.9)	45s
Check stdlib with stubtest (ubuntu-24.04, 3.10)	45s
Check stdlib with stubtest (ubuntu-24.04, 3.11)	48s
Check stdlib with stubtest (ubuntu-24.04, 3.12)	35s
Check stdlib with stubtest (ubuntu-24.04, 3.13)	37s
Check stdlib with stubtest (windows-latest, 3.9)	1m 29s
Check stdlib with stubtest (windows-latest, 3.10)	1m 43s
Check stdlib with stubtest (windows-latest, 3.11)	1m 24s
Check stdlib with stubtest (windows-latest, 3.12)	1m 46s
Check stdlib with stubtest (windows-latest, 3.13)	1m 49s
Check stdlib with stubtest (macos-latest, 3.9)	47s
Check stdlib with stubtest (macos-latest, 3.10)	59s
Check stdlib with stubtest (macos-latest, 3.11)	44s
Check stdlib with stubtest (macos-latest, 3.12)	33s
Check stdlib with stubtest (macos-latest, 3.13)	32s
	15m 16s

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