zarrs_opendal: Prepare 0.3.0 release #614

Job	Run time
fmt	21s
build_and_test_macos (macos-13)	2m 16s
build_and_test_windows	3m 22s
build_and_test_macos (macos-latest)	1m 1s
build_and_test (stable, --features "")	1m 27s
build_and_test (stable, --all-features)	2m 16s
clippy	45s
build_and_test (stable, --no-default-features)	56s
codecov	1m 36s
build_and_test (1.76, --features "")	1m 49s
build_and_test (1.76, --all-features)	2m 15s
minimal-versions	55s
build_and_test (1.76, --no-default-features)	1m 2s
semver	1m 40s
build_and_test (beta, --features "")	1m 28s
build_and_test (beta, --all-features)	2m 47s
build_and_test (beta, --no-default-features)	57s
build_and_test (nightly, --features "")	1m 18s
build_and_test (nightly, --all-features)	1m 39s
build_and_test (nightly, --no-default-features)	52s
	30m 42s

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