Bump version to 4.44.0 #1089

Job	Run time
Run tests with coverage	3m 3s
Run tests on legacy versions (3.7)	2m 14s
Run tests with different pydantic versions	3m 32s
Run linters (flake8)	1m 49s
Run linters (pydocstyle)	1m 54s
Run tests (3.8)	1m 55s
Run tests (3.9)	1m 57s
Run linters (mypy)	1m 48s
Run linters (pylint)	1m 54s
Run tests (3.10)	1m 57s
Run tests (3.11)	1m 55s
Run tests (3.12)	2m 1s
Run tests (3.13)	2m 32s
	28m 31s

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