Move `gift` to `gift-cipher` and `speck` to `speck-cipher` #1006

Job	Run time
test (stable)	21s
build (1.85.0, wasm32-unknown-unknown)	18s
build (stable, thumbv7em-none-eabi)	56s
build (1.85.0, thumbv7em-none-eabi)	56s
test (1.85.0)	56s
build (stable, wasm32-unknown-unknown)	56s
minimal-versions / minimal-versions	56s
	5m 19s

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