Improve macOS AArch64 JIT stencils by relaxing GOT loads

Proposal:

The AArch64 JIT has support for optimising pairs of instructions that load an address through the global offset table (GOT).
On Linux, the JIT optimiser recognises assembly like:

adrp x9, :got:__PyRuntime
ldr  x9, [x9, :got_lo12:__PyRuntime]

https://github.com/python/cpython/blob/0ba7be9a18e8b03af1c046d676f71be9208e06d4/Tools/jit/_optimizers.py#L586-L591

On macOS, Clang uses a different syntax recognised by the Mach-O linker:

adrp x9, __PyRuntime@GOTPAGE
ldr  x9, [x9, __PyRuntime@GOTPAGEOFF]

We can add support for this using the existing patch_aarch64_33rx() function just by adjusting the regex which would enable the same optimisation we already use on Linux:

adrp x9, <__PyRuntime page>
add  x9, x9, <page offset>

This is a natural followup to #157040. I have a small patch ready once jit development is unblocked.

Benchmark:

On my M5 MacBook Pro this shows a 1.16% improvement on the pyperformance suite though results are very noisy. Probably best to re-run with the official benchmarking runners.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

#148598, #148501, #157040 /cc @diegorusso

從 Tools/jit/_optimizers.py 中的 patch_aarch64_33rx() 開始，將現有的 Linux GOT-load 模式與此處描述的 Clang macOS 語法進行比較。更新比對邏輯，使現有的 AArch64 最佳化能夠套用，然後執行 pyperformance 套件或官方 benchmarking runner 以檢查結果。