JIT

gh-131798: Use `sym_new_type` instead of `sym_new_not_null` for _BUILD_STRING, _BUILD_SET #3310

Job	Run time
Interpreter (Debug)	9m 25s
Free-Threaded (Debug) (19)	14m 44s
i686-pc-windows-msvc/msvc (Debug)	20m 46s
i686-pc-windows-msvc/msvc (Release)	12m 5s
x86_64-pc-windows-msvc/msvc (Debug)	20m 43s
x86_64-pc-windows-msvc/msvc (Release)	11m 29s
aarch64-pc-windows-msvc/msvc (Debug)	20m 50s
aarch64-pc-windows-msvc/msvc (Release)	19m 10s
x86_64-apple-darwin/clang (Debug)	11m 20s
x86_64-apple-darwin/clang (Release)	8m 5s
aarch64-apple-darwin/clang (Debug)	8m 44s
aarch64-apple-darwin/clang (Release)	8m 9s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 8s
x86_64-unknown-linux-gnu/gcc (Release)	6m 16s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 10s
aarch64-unknown-linux-gnu/gcc (Release)	5m 58s
	3h 15m 2s

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