Python: Support | and |= operators for KernelArgument

[KanchiShimono]

Motivation and Context

KernelArguments extends the built-in dict by adding an execution_settings attribute.
However, when using the | and |= operators, only the dict part (excluding execution_settings) is merged, and the result becomes a plain dict.
This causes the execution_settings attribute to be lost and not updated.

Description

• Implemented support for the | and |= operators to make it easier for users to merge KernelArgument objects.
• The right-hand or left-hand side of the operator can be either a KernelArgument or a dict (or any subclass of dict).
• When merging, both the execution_settings attribute and the rest of the dict data are merged individually, and the result is returned as a KernelArgument.
• As long as either side of the operator is a KernelArgument, the result will also be a KernelArgument.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
functions
kernel_arguments.py	41	2	95%	87, 103
TOTAL	26450	3951	85%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3652	22 💤	0 ❌	0 🔥	2m 8s ⏱️