[3.12] gh-105144: Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMeta.subclasscheck` (GH-105152) (#105160)

(cherry picked from commit c05c31db8c9dfd708b9857bb57f8e5f3ce40266d)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Miss Islington (bot) committed 2y ago

076f3cda140a45b08c2c9518bc19624aae50d3a3

Parent: 4f477c7

Committed by GitHub <noreply@github.com> on 5/31/2023, 5:35:03 PM

[3.12] gh-105144: Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMeta.__subclasscheck__` (GH-105152) (#105160)