Release tracking PR: `v0.19.0` #406

Job	Run time
Test - stable toolchain (minimal)	50s
Test - stable toolchain (recent)	52s
Integration tests - stable toolchain (0.18.0)	47s
Test - 1.56.1 toolchain (minimal)	3m 3s
Integration tests - stable toolchain (0.18.1)	53s
Test - nightly toolchain (minimal)	50s
Test - 1.56.1 toolchain (recent)	3m 14s
Test - nightly toolchain (recent)	51s
Integration tests - stable toolchain (0.19.0.1)	1m 0s
Integration tests - stable toolchain (0.19.1)	57s
Integration tests - stable toolchain (0.20.0)	57s
Integration tests - stable toolchain (0.20.1)	1m 1s
Integration tests - stable toolchain (0.21.0)	1m 3s
	16m 18s

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