feat(sol-macro): add transient storage keyword support #2749

Job	Run time
features stable --all-targets	3m 25s
wasm	37s
features nightly	2m 47s
features nightly --all-targets	4m 23s
features stable	2m 6s
miri	6m 55s
miri --all-features	9m 22s
miri --no-default-features	5m 53s
clippy	1m 27s
typos	7s
docs	1m 15s
fmt	16s
check no_std	47s
test ubuntu-latest stable --no-default-features	1m 2s
test ubuntu-latest 1.85	33s
test ubuntu-latest nightly	1m 13s
test ubuntu-latest 1.85 --no-default-features	32s
test ubuntu-latest stable	54s
test windows-latest nightly --no-default-features	2m 54s
test ubuntu-latest nightly --no-default-features	1m 14s
test windows-latest stable --no-default-features	2m 12s
test ubuntu-latest 1.85 --features json	34s
test windows-latest stable	2m 15s
test windows-latest nightly	2m 51s
test ubuntu-latest nightly --all-features	1m 39s
test windows-latest 1.85 --features json	1m 28s
test windows-latest 1.85	1m 54s
test windows-latest 1.85 --no-default-features	1m 22s
deny / cargo deny check	17s
test windows-latest nightly --all-features	3m 46s
ci success	5s
	1h 6m 5s

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