PyEllipsis and PyNotImplemented new get_bound api

[snuderl]

Parts of #3684

This adds get_bound method to PyEllipsis and PyNotImplemented

[codspeed-hq]

CodSpeed Performance Report

Merging #3797 will degrade performances by 10.75%

_{Comparing snuderl:PyEllipsis-and-NotImplemented-get-bound-api (f1384f3) with main (5dbb51b)}

Summary

⚡ 3 improvements
❌ 1 regressions
✅ 75 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	snuderl:PyEllipsis-and-NotImplemented-get-bound-api	Change
⚡	mapping_from_dict	327.8 ns	272.2 ns	+20.41%
⚡	sequence_from_list	355.6 ns	300 ns	+18.52%
⚡	not_a_list_via_downcast	242.8 ns	215 ns	+12.92%
❌	f64_from_pyobject	461.1 ns	516.7 ns	-10.75%

[davidhewitt]

Thanks, overall looks good! Just a couple of tiny adjustments that I'd like to see...

(I also notice now that I missed we didn't do this for the PyNone change earlier, it might be nice to go back and do that either as part of this PR or a separate follow-up.)

[snuderl]

Thanks, overall looks good! Just a couple of tiny adjustments that I'd like to see...

(I also notice now that I missed we didn't do this for the PyNone change earlier, it might be nice to go back and do that either as part of this PR or a separate follow-up.)

Done

[davidhewitt]

Perfect, thanks!

[davidhewitt]

Ah good catch! 👍