Tests

Implement DiagonalStudentT.sample method natively in keras #205

Job	Run time
lint	1m 24s
test (ubuntu-latest, 3.10, jax)	5m 23s
test (ubuntu-latest, 3.10, tensorflow)	5m 22s
test (ubuntu-latest, 3.10, torch)	3m 48s
test (ubuntu-latest, 3.11, jax)	6m 44s
test (ubuntu-latest, 3.11, tensorflow)	5m 39s
test (ubuntu-latest, 3.11, torch)	3m 58s
test (windows-latest, 3.10, jax)	11m 32s
test (windows-latest, 3.10, tensorflow)	10m 32s
test (windows-latest, 3.10, torch)	11m 30s
test (windows-latest, 3.11, jax)	11m 35s
test (windows-latest, 3.11, tensorflow)	10m 26s
test (windows-latest, 3.11, torch)	9m 57s
	1h 37m 50s

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