JIT

gh-148078: Fix uses of sym_is_not_null in JIT optimizer #5844

Job	Run time
Interpreter (Debug)	12m 4s
JIT with tail calling interpreter	4m 34s
Free-Threaded (Debug)	4m 0s
JIT without optimizations (Debug)	3m 53s
aarch64-unknown-linux-gnu/gcc (Release)	6m 50s
x86_64-unknown-linux-gnu/gcc (Release)	9m 1s
x86_64-unknown-linux-gnu/gcc (Debug)	14m 20s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 57s
i686-pc-windows-msvc/msvc (Debug)	21m 14s
x86_64-apple-darwin/clang (Debug)	1h 5m 0s
x86_64-apple-darwin/clang (Release)	53m 3s
x86_64-pc-windows-msvc/msvc (Release)	16m 2s
i686-pc-windows-msvc/msvc (Release)	15m 2s
aarch64-pc-windows-msvc/msvc (Release)	18m 38s
aarch64-pc-windows-msvc/msvc (Debug)	27m 1s
aarch64-apple-darwin/clang (Release)	12m 58s
x86_64-pc-windows-msvc/msvc (Debug)	29m 47s
aarch64-apple-darwin/clang (Debug)	13m 11s
	5h 35m 35s

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