Optimise keyword arguments in the JIT

Since the JIT traces can see both sides of the call, it can remove the work done to parse and shuffle the arguments during optimization.

For example, calling the function

def foo(a, b): pass

with keyword arguments:

foo(0, b=2, a=1)

requires the tuple ("b", "a") to pushed to the stack after the arguments
and for the CALL_KW_PY instruction to parse and reorder the arguments.

We can work out the reordering required and emit the necessary stack permuting code,
then replace the CALL_KW_PY with a much more effcient CALL_PY_EXACT_ARGS

In the example above:

LOAD_CONSTANT ("b", "a")
CALL_KW_PY 3

can be replaced with

SWAP 2
CALL_PY_EXACT_ARGS 3

Linked PRs

• gh-151389

从 JIT 对 CALL_KW_PY 和 CALL_PY_EXACT_ARGS 的处理开始，使用 issue 中的关键字调用示例来理解所需的参数重排。完成的标准是 JIT 能够用执行栈置换的代码和精确参数调用替换关键字调用，同时保持所示的调用行为；gh-151389 与此工作相关联。