Fix hydra-auto-schema pydantic serialization issue #650

Job	Run time
Run linting/pre-commit checks	48s
Run linting/pre-commit checks	48s
check_docs	1m 2s
check_docs	1m 2s
unit_tests (ubuntu-latest, 3.10)	5m 20s
unit_tests (ubuntu-latest, 3.10)	5m 20s
unit_tests (macos-latest, 3.10)	6m 40s
unit_tests (macos-latest, 3.10)	6m 40s
local_integration_tests (3.10)	4m 55s
local_integration_tests (3.10)	16m 48s
launch-slurm-actions-runner	0s
Run integration tests on the ${{ matrix.cluster }} cluster in job ${{ needs.launch-slurm-actions-runner.outputs.job_id }}	0s
Upload coverage reports to Codecov	0s
Upload coverage reports to Codecov	7s
launch-slurm-actions-runner (mila)	9s
Run integration tests on the mila cluster in job	4m 24s
	54m 3s

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