ci: do not limit feature powerset check by depth #4293

Job	Run time
docs	56s
clippy	37s
cfg-check	26s
check no_std	20s
doctest	1m 16s
feature-checks	3m 11s
fmt	14s
test ubuntu-latest stable --no-default-features	1m 14s
wasm-unknown	42s
wasm-wasi	1m 11s
test ubuntu-latest stable	1m 26s
test ubuntu-latest stable --all-features	2m 17s
test ubuntu-latest nightly --no-default-features	1m 6s
test ubuntu-latest nightly	1m 24s
test ubuntu-latest nightly --all-features	2m 14s
test ubuntu-latest 1.79 --no-default-features	49s
test ubuntu-latest 1.79	55s
test windows-latest stable --no-default-features	4m 54s
test windows-latest stable	4m 14s
test windows-latest stable --all-features	6m 6s
test windows-latest nightly --no-default-features	3m 10s
test windows-latest nightly	3m 36s
test windows-latest nightly --all-features	4m 59s
test windows-latest 1.79 --no-default-features	2m 55s
test windows-latest 1.79	2m 59s
	53m 11s

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