feat(core): forward bound kwargs in RunnableBinding.__getattr__

[Mohammad Mohtashim (keenborder786)]

• RunnableBinding.getattr now forwards bound kwargs to delegated methods that accept **kwargs.
• Previously, only bound config was passed to the underlying runnable's methods. Now, bound kwargs are also forwarded to methods with **kwargs, with explicit kwargs taking precedence.

runnable.bind(foo="bar").some_method(baz="qux")
# some_method receives: foo="bar", baz="qux"

Use case was identified in #35320

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

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✅ 13 untouched benchmarks
⏩ 22 skipped benchmarks¹

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_{Comparing keenborder786:mmk/bound_parameters (dc42e89) with master (4af87fd)²}

Footnotes

1. 22 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on master (135a208) during the generation of this report, so 4af87fd was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩