[v1.x] Support Python 3.14 #4283

Job	Run time
checks / pre-commit	29s
checks / doc-snippets	14s
checks / test (3.12, highest, windows-latest)	2m 50s
checks / test (3.13, highest, ubuntu-latest)	48s
checks / test (3.12, lowest-direct, ubuntu-latest)	50s
checks / test (3.13, highest, windows-latest)	2m 12s
checks / test (3.11, highest, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, ubuntu-latest)	48s
checks / test (3.10, highest, ubuntu-latest)	45s
checks / test (3.11, lowest-direct, ubuntu-latest)	43s
checks / test (3.12, lowest-direct, windows-latest)	3m 2s
checks / test (3.11, lowest-direct, windows-latest)	2m 56s
checks / test (3.11, highest, windows-latest)	2m 14s
checks / test (3.10, lowest-direct, windows-latest)	2m 18s
checks / test (3.12, highest, ubuntu-latest)	47s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.10, lowest-direct, ubuntu-latest)	44s
checks / test (3.14, lowest-direct, windows-latest)	1m 48s
checks / test (3.10, highest, windows-latest)	2m 23s
checks / test (3.13, lowest-direct, windows-latest)	2m 23s
checks / test (3.14, highest, ubuntu-latest)	1m 8s
checks / test (3.14, highest, windows-latest)	2m 5s
all-green	5s
	33m 24s

Provide feedback