fix: differentiate max witness script size upon context #2055

Job	Run time
Test - 1.63.0 toolchain (minimal)	25m 4s
Test - 1.63.0 toolchain (recent)	25m 5s
Test - nightly toolchain (minimal)	14m 16s
Lint - nightly toolchain (recent)	31s
Test - nightly toolchain (recent)	14m 16s
Test - stable toolchain (minimal)	15m 54s
Test - stable toolchain (recent)	15m 43s
Bench - nightly toolchain (recent)	56s
Docs - stable toolchain (recent)	28s
Docs - nightly toolchain (recent)	29s
Embedded	1m 33s
Format - nightly toolchain	12s
Integration tests - stable toolchain (26_0)	1m 10s
Integration tests - stable toolchain (25_2)	59s
Integration tests - stable toolchain (25_1)	1m 0s
Integration tests - stable toolchain (25_0)	55s
Integration tests - stable toolchain (24_2)	55s
Integration tests - stable toolchain (24_1)	55s
Integration tests - stable toolchain (24_0_1)	54s
Integration tests - stable toolchain (23_2)	56s
Integration tests - stable toolchain (23_1)	56s
Integration tests - stable toolchain (23_0)	56s
Integration tests - stable toolchain (22_1)	55s
Integration tests - stable toolchain (22_0)	56s
Integration tests - stable toolchain (0_21_2)	1m 9s
Integration tests - stable toolchain (0_20_2)	1m 7s
Integration tests - stable toolchain (0_19_1)	1m 4s
Integration tests - stable toolchain (0_18_1)	56s
Integration tests - stable toolchain (0_17_1)	56s
	2h 11m 6s

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