Add kernel_name to examples.json

[paoloredis]

Note

Low Risk
Low risk: adds an optional kernelName field derived from a new KERNEL_NAME marker without changing existing example parsing behavior or execution flow.

Overview
Adds support for an optional per-example kernel identifier. The Example parser now recognizes a KERNEL_NAME marker in example source files and stores it as kernel_name, and both the remote (component.py) and local (local_examples.py) example builders emit this value as kernelName in generated example metadata when present.

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[github-actions]

DOC-6376

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[andy-stark-redis]

Yeah, I got kernelName to appear in examples.json for a local build, so LGTM.