Remove deprecated k= argument alias from Top-N metrics #2645

Job	Run time
Evaluation-based tests	15m 12s
Minimal dependency tests (all options)	18m 18s
Minimal dependency tests	15m 36s
Demos, examples, and docs	4m 32s
Rust test coverage	13m 49s
Vanilla Python 3.12.5 on ubuntu-latest	14m 34s
Vanilla Python 3.12.5 on windows-latest	17m 55s
Vanilla Python 3.13 on ubuntu-24.04-arm	13m 25s
Vanilla Python 3.12.5 on macos-latest	13m 22s
Vanilla Python 3.14 on ubuntu-latest	10m 52s
Vanilla Python 3.12.5 on ubuntu-24.04-arm	15m 52s
Vanilla Python 3.14 on macos-latest	9m 33s
Vanilla Python 3.13 on windows-latest	17m 33s
Vanilla Python 3.14t on windows-latest	15m 38s
Vanilla Python 3.13 on ubuntu-latest	13m 7s
Vanilla Python 3.13 on macos-latest	14m 56s
Vanilla Python 3.14 on ubuntu-24.04-arm	11m 12s
Vanilla Python 3.14t on ubuntu-24.04-arm	10m 49s
Vanilla Python 3.14t on ubuntu-latest	11m 5s
Vanilla Python 3.14t on macos-latest	13m 24s
Vanilla Python 3.14 on windows-latest	13m 38s
Test suite results	30s
	4h 44m 52s

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