Flesh out v17 and v18 #1

Job	Run time
Prepare	4s
Docs - stable toolchain (recent)	10s
Integration tests - stable toolchain (28_0)	52s
Test - 1.63.0 toolchain (minimal)	1m 58s
Integration tests - stable toolchain (27_1)	45s
Test - stable toolchain (minimal)	5s
Test - 1.63.0 toolchain (recent)	1m 53s
Integration tests - stable toolchain (27_0)	41s
Test - stable toolchain (recent)	7s
Integration tests - stable toolchain (26_2)	1m 23s
Integration tests - stable toolchain (26_1)	1m 27s
Integration tests - stable toolchain (26_0)	1m 28s
Integration tests - stable toolchain (25_2)	1m 42s
Integration tests - stable toolchain (25_1)	1m 29s
Integration tests - stable toolchain (25_0)	54s
Integration tests - stable toolchain (24_2)	56s
Integration tests - stable toolchain (24_1)	1m 42s
Integration tests - stable toolchain (24_0_1)	1m 14s
Integration tests - stable toolchain (23_2)	1m 36s
Integration tests - stable toolchain (23_1)	1m 6s
Integration tests - stable toolchain (23_0)	1m 27s
Integration tests - stable toolchain (22_1)	1m 34s
Integration tests - stable toolchain (22_0)	49s
Integration tests - stable toolchain (0_21_2)	46s
Integration tests - stable toolchain (0_20_2)	41s
Integration tests - stable toolchain (0_19_1)	46s
Integration tests - stable toolchain (0_18_1)	1m 7s
Integration tests - stable toolchain (0_17_1)	1m 31s
Docs - nightly toolchain (recent)	14s
Test - nightly toolchain (minimal)	12s
Lint - nightly toolchain (recent)	43s
Test - nightly toolchain (recent)	20s
	31m 42s

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