Add missing NumPy ops layer APIs to keras.ops

[shashaka]

This PR adds the following missing numpy ops APIs:

• keras.ops.corrcoef
• keras.ops.heaviside

[gemini-code-assist]

Summary of Changes

Hello @shashaka, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

I've opened this pull request to enhance the keras.ops module by incorporating two previously missing NumPy-like operations: corrcoef and heaviside. This change aims to provide a more comprehensive and consistent set of numerical operations within Keras, making it easier for users to perform common array manipulations directly through keras.ops. The primary impact is the expansion of Keras's built-in functional capabilities, reducing the need to rely on external NumPy calls for these specific operations.

Highlights

• API Expansion: I've added the keras.ops.corrcoef function to the keras.ops module, aligning Keras's operational capabilities more closely with standard NumPy.
• API Expansion: I've also added the keras.ops.heaviside function to the keras.ops module, further completing the set of NumPy-like operations available in Keras.
• API Listing Update: The scripts/api_master.py file has been updated to include these new operations, ensuring they are properly listed and exposed as part of the Keras API.

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[gemini-code-assist]

Code Review

This pull request adds two new NumPy ops, corrcoef and heaviside, to the API master list. The change is mostly correct, but keras.ops.heaviside has been added in the wrong alphabetical position. I've left a comment with a suggestion to fix the ordering to maintain consistency within the file.

[fchollet]

LGTM, thanks