JIT

gh-131798: Use `sym_new_type` instead of `sym_new_not_null` for _BUILD_STRING, _BUILD_SET #3315

Job	Run time
Interpreter (Debug)	9m 8s
Free-Threaded (Debug) (19)	13m 44s
i686-pc-windows-msvc/msvc (Debug)	20m 38s
i686-pc-windows-msvc/msvc (Release)	11m 23s
x86_64-pc-windows-msvc/msvc (Debug)	20m 39s
x86_64-pc-windows-msvc/msvc (Release)	11m 55s
aarch64-pc-windows-msvc/msvc (Debug)	20m 27s
aarch64-pc-windows-msvc/msvc (Release)	17m 2s
x86_64-apple-darwin/clang (Debug)	11m 2s
x86_64-apple-darwin/clang (Release)	8m 14s
aarch64-apple-darwin/clang (Debug)	8m 53s
aarch64-apple-darwin/clang (Release)	8m 43s
x86_64-unknown-linux-gnu/gcc (Debug)	10m 12s
x86_64-unknown-linux-gnu/gcc (Release)	6m 7s
aarch64-unknown-linux-gnu/gcc (Debug)	7m 45s
aarch64-unknown-linux-gnu/gcc (Release)	6m 43s
	3h 12m 35s

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