Remove pydantic pin #2337

Job	Run time
linter	1m 29s
unit test / python 3.8	50s
build packages	13s
unit test / python 3.9	54s
unit test / python 3.10	52s
unit test / python 3.11	52s
verify packages / python 3.8 / ubuntu-latest	1m 12s
verify packages / python 3.9 / ubuntu-latest	1m 4s
verify packages / python 3.10 / ubuntu-latest	1m 0s
verify packages / python 3.11 / ubuntu-latest	1m 6s
verify packages / python 3.8 / macos-latest	1m 19s
verify packages / python 3.9 / macos-latest	1m 4s
verify packages / python 3.10 / macos-latest	45s
verify packages / python 3.11 / macos-latest	1m 8s
verify packages / python 3.8 / windows-latest	2m 41s
verify packages / python 3.9 / windows-latest	3m 34s
verify packages / python 3.10 / windows-latest	2m 55s
verify packages / python 3.11 / windows-latest	2m 24s
	25m 22s

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