fuzz: add target for tapscript parsing from script #2141

Job	Run time
Embedded	1m 23s
Docs - stable toolchain (recent)	40s
Bench - nightly toolchain (recent)	3m 26s
Docs - nightly toolchain (recent)	39s
Format - nightly toolchain	13s
Lint - nightly toolchain (recent)	32s
Integration tests - stable toolchain (26_0)	2m 42s
Test - 1.63.0 toolchain (minimal)	28m 30s
Integration tests - stable toolchain (25_2)	4m 7s
Test - nightly toolchain (minimal)	14m 11s
Test - 1.63.0 toolchain (recent)	28m 28s
Test - stable toolchain (minimal)	16m 33s
Integration tests - stable toolchain (25_1)	2m 31s
Test - nightly toolchain (recent)	14m 38s
Integration tests - stable toolchain (25_0)	2m 34s
Test - stable toolchain (recent)	16m 12s
Integration tests - stable toolchain (24_2)	1m 0s
Integration tests - stable toolchain (24_1)	1m 9s
Integration tests - stable toolchain (24_0_1)	3m 6s
Integration tests - stable toolchain (23_2)	1m 0s
Integration tests - stable toolchain (23_1)	1m 0s
Integration tests - stable toolchain (23_0)	2m 29s
Integration tests - stable toolchain (22_1)	1m 12s
Integration tests - stable toolchain (22_0)	1m 5s
Integration tests - stable toolchain (0_21_2)	2m 9s
Integration tests - stable toolchain (0_20_2)	1m 12s
Integration tests - stable toolchain (0_19_1)	2m 12s
Integration tests - stable toolchain (0_18_1)	54s
Integration tests - stable toolchain (0_17_1)	1m 15s
	2h 37m 2s

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