feat: make some ops `new` be const fn #1503

Job	Run time
build_all_features	4m 41s
build_all_platforms (ubuntu-latest)	2m 25s
build_all_platforms (macos-latest)	2m 2s
build_default_features (ubuntu-latest)	38s
build_under_wasm	47s
build_all_platforms (windows-latest)	4m 36s
build_default_features (macos-latest)	37s
build_default_features (windows-latest)	1m 51s
check_clippy	3m 30s
check_docs	3m 21s
check_msrv	31s
unit	6m 32s
	31m 31s

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