feat(bindings/python): add sync `File.readline` #7883

Job	Run time
build-java-doc	23s
build-rust-doc	4m 27s
build-c-doc	26s
build-nodejs-doc	25s
build-cpp-doc	31s
build-dav-server-opendalfs-doc	54s
build-fuse3-opendal-doc	50s
build-haskell-doc	3m 45s
build-object-store-opendal-doc	49s
build-lua-doc	8s
build-ocaml-doc	4m 49s
build-parquet-opendal-doc	48s
build-python-doc	3m 8s
build-virtiofs-opendal-doc	49s
build-unftp-sbe-opendal-doc	1m 12s
build-opendal-compat-doc	49s
build-website	2m 13s
	26m 26s

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