refactor: Remove batch concept from opendal (#5393) #2131

Job	Run time
build_all_features	5m 7s
build_all_platforms (ubuntu-latest)	3m 17s
build_default_features (ubuntu-latest)	34s
build_all_platforms (macos-latest)	2m 19s
build_under_wasm	1m 3s
build_default_features (macos-latest)	48s
build_all_platforms (windows-latest)	6m 18s
build_default_features (windows-latest)	1m 46s
check_docs	3m 17s
check_clippy	3m 58s
check_msrv	31s
unit	6m 39s
	35m 37s

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