`Slice<T>::iterator` to be `contiguous` and `random_access` #5402

Job	Run time
Clang Tidy	0s
Meson	0s
Clippy	0s
Bazel on ${{ (((matrix.os == 'ubuntu') && 'Linux') \|\| ((matrix.os == 'macos') && 'macOS') \|\| ((matrix.os == 'windows') && 'Windows') \|\| '???') }}	0s
Outdated	0s
Reindeer	0s
pre_ci / pre_ci	3s
Documentation	33s
Minimal versions	17s
Rust nightly	23s
Rust beta	27s
Rust stable	11s
Rust 1.70.0	34s
Rust 1.74.0	26s
Cargo on macOS	21s
Cargo on Windows (msvc)	54s
	4m 9s

Provide feedback