Add `tzdb_data` crate #602

Job	Run time
clippy-pedantic	19s
test	35s
fmt	19s
audit	17s
lint (1.56)	1m 31s
lint (1.56, -Zminimal-versions)	1m 31s
cross-miri (aarch64-unknown-linux-gnu)	49s
doc	29s
lint (stable)	23s
DevSkim	33s
lint (stable, -Zminimal-versions)	19s
cross-miri (i586-unknown-linux-gnu)	45s
lint (nightly)	36s
cross-miri (powerpc-unknown-linux-gnu)	43s
Miri	56s
lint (nightly, -Zminimal-versions)	27s
cross-miri (powerpc64-unknown-linux-gnu)	43s
package	15s
cross-miri (powerpc64le-unknown-linux-gnu)	42s
	12m 12s

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