JIT

gh-131798: Use `sym_new_type` instead of `sym_new_not_null` for _BUILD_STRING, _BUILD_SET #3203

Job	Run time
Interpreter (Debug)	9m 15s
Free-Threaded (Debug) (19)	13m 48s
i686-pc-windows-msvc/msvc (Debug)	21m 15s
i686-pc-windows-msvc/msvc (Release)	13m 28s
x86_64-pc-windows-msvc/msvc (Debug)	20m 39s
x86_64-pc-windows-msvc/msvc (Release)	12m 54s
aarch64-pc-windows-msvc/msvc (Debug)	14m 13s
aarch64-pc-windows-msvc/msvc (Release)	13m 54s
x86_64-apple-darwin/clang (Debug)	14m 20s
x86_64-apple-darwin/clang (Release)	10m 7s
aarch64-apple-darwin/clang (Debug)	8m 48s
aarch64-apple-darwin/clang (Release)	8m 19s
x86_64-unknown-linux-gnu/gcc (Debug)	9m 59s
x86_64-unknown-linux-gnu/gcc (Release)	6m 13s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 10s
aarch64-unknown-linux-gnu/gcc (Release)	6m 13s
	3h 10m 35s

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