refactor: rename crate `hudi-tests` to `hudi-test` #634

Job	Run time
integration-tests	5m 8s
rust-tests (ubuntu-22.04)	4m 50s
python-tests (ubuntu-22.04, 3.9)	1m 52s
python-tests (ubuntu-22.04, 3.12)	1m 55s
python-tests (macos-14, 3.12)	2m 15s
Publish coverage reports to codecov.io	5s
	16m 5s

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