Encapsulate ZBufSliceIterator in ZBytesSliceIterator #8148

Job	Run time
Lints and doc tests on ubuntu-latest	8m 31s
Unit tests on ubuntu-latest	19m 0s
Lints and doc tests on windows-latest	11m 14s
Unit tests on windows-latest	25m 50s
Lints and doc tests on macos-13	18m 20s
Unit tests on macos-13	11m 26s
Lints and doc tests on macos-14	6m 41s
Unit tests on macos-14	9m 10s
Typos Check	4s
Memory leak checks	2m 5s
CI status checks	1s
	1h 52m 22s

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