feat: `last_rel` #1456

Job	Run time
Smoke test: stock R	21m 42s
Check matrix	7s
Without adbcdrivermanager	35m 53s
rcc: ${{ matrix.os }} (${{ matrix.r }}) ${{ matrix.desc }}	0s
Without arrow	35m 40s
Without bit64	34m 42s
Without clock	36m 12s
Without DBItest	36m 17s
Without dbplyr	35m 9s
Without dplyr	36m 38s
	4h 32m 20s

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