feat: check policy validity to prevent duplicate check #2104

Job	Run time
Test - stable toolchain (minimal)	16m 14s
Lint - nightly toolchain (recent)	44s
Test - stable toolchain (recent)	16m 17s
Test - nightly toolchain (minimal)	14m 51s
Test - nightly toolchain (recent)	14m 19s
Bench - nightly toolchain (recent)	55s
Docs - stable toolchain (recent)	46s
Docs - nightly toolchain (recent)	39s
Embedded	1m 50s
Format - nightly toolchain	12s
Integration tests - stable toolchain (26_0)	49s
Test - 1.63.0 toolchain (minimal)	26m 27s
Integration tests - stable toolchain (25_2)	1m 0s
Integration tests - stable toolchain (25_1)	50s
Test - 1.63.0 toolchain (recent)	26m 13s
Integration tests - stable toolchain (25_0)	1m 2s
Integration tests - stable toolchain (24_2)	49s
Integration tests - stable toolchain (24_1)	48s
Integration tests - stable toolchain (24_0_1)	1m 11s
Integration tests - stable toolchain (23_2)	48s
Integration tests - stable toolchain (23_1)	53s
Integration tests - stable toolchain (23_0)	58s
Integration tests - stable toolchain (22_1)	49s
Integration tests - stable toolchain (22_0)	49s
Integration tests - stable toolchain (0_21_2)	1m 10s
Integration tests - stable toolchain (0_20_2)	48s
Integration tests - stable toolchain (0_19_1)	59s
Integration tests - stable toolchain (0_18_1)	48s
Integration tests - stable toolchain (0_17_1)	58s
	2h 14m 56s

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