JIT

gh-131798: Use `sym_new_type` instead of `sym_new_not_null` for _BUILD_STRING, _BUILD_SET #3314

Job	Run time
Interpreter (Debug)	9m 10s
Free-Threaded (Debug) (19)	14m 24s
i686-pc-windows-msvc/msvc (Debug)	20m 30s
i686-pc-windows-msvc/msvc (Release)	11m 41s
x86_64-pc-windows-msvc/msvc (Debug)	20m 47s
x86_64-pc-windows-msvc/msvc (Release)	11m 47s
aarch64-pc-windows-msvc/msvc (Debug)	21m 15s
aarch64-pc-windows-msvc/msvc (Release)	17m 20s
x86_64-apple-darwin/clang (Debug)	15m 3s
x86_64-apple-darwin/clang (Release)	8m 58s
aarch64-apple-darwin/clang (Debug)	8m 29s
aarch64-apple-darwin/clang (Release)	8m 7s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 31s
x86_64-unknown-linux-gnu/gcc (Release)	6m 8s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 3s
aarch64-unknown-linux-gnu/gcc (Release)	5m 50s
	3h 17m 3s

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