JIT

gh-145098: Use `macos-15-intel` instead of unstable `macos-26-intel` in `{jit,tail-call}.yml` #5866

Job	Run time
Free-Threaded (Debug)	3m 54s
JIT with tail calling interpreter	3m 53s
Interpreter (Debug)	4m 15s
JIT without optimizations (Debug)	3m 44s
x86_64-unknown-linux-gnu/gcc (Release)	4m 5s
aarch64-unknown-linux-gnu/gcc (Debug)	4m 15s
aarch64-unknown-linux-gnu/gcc (Release)	4m 15s
aarch64-apple-darwin/clang (Debug)	4m 18s
x86_64-pc-windows-msvc/msvc (Debug)	4m 6s
i686-pc-windows-msvc/msvc (Debug)	4m 7s
x86_64-pc-windows-msvc/msvc (Release)	4m 5s
aarch64-pc-windows-msvc/msvc (Release)	4m 8s
i686-pc-windows-msvc/msvc (Release)	4m 5s
aarch64-apple-darwin/clang (Release)	4m 19s
aarch64-pc-windows-msvc/msvc (Debug)	4m 9s
x86_64-apple-darwin/clang (Debug)	4m 17s
x86_64-unknown-linux-gnu/gcc (Debug)	4m 15s
x86_64-apple-darwin/clang (Release)	4m 22s
	1h 14m 32s

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