feat: Stop the PMTUD search at the interface MTU #4139

Job	Run time
check (ubuntu-latest, 1.76.0, debug)	4m 26s
check (ubuntu-latest, stable, debug)	6m 33s
check (ubuntu-latest, nightly, debug)	4m 21s
check (macos-latest, 1.76.0, debug)	3m 55s
check (macos-latest, stable, debug)	5m 33s
check (macos-latest, nightly, debug)	3m 47s
check (windows-latest, 1.76.0, debug)	9m 27s
check (windows-latest, stable, debug)	14m 12s
check (windows-latest, nightly, debug)	8m 43s
check (ubuntu-latest, stable, release)	8m 42s
bench / Benchmark	15m 11s
	1h 24m 50s

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