Test

🏷️ Allow `Discriminator` type for `discriminator` parameter in `Field` #3404

Job	Run time
test (macos-latest, 3.14, highest)	33s
test (windows-latest, 3.14, highest)	49s
test (macos-latest, 3.11, highest)	47s
test (ubuntu-latest, 3.10, lowest-direct)	28s
test (macos-latest, 3.13, highest)	35s
test (windows-latest, 3.12, lowest-direct)	1m 31s
test (ubuntu-latest, 3.14, highest)	32s
test (ubuntu-latest, 3.13, highest)	27s
coverage-combine	23s
alls-green	5s
	6m 10s

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