Improve error handling in load_expected_versions() function across test notebooks

[coderabbitai]

Problem

The load_expected_versions() function in test notebooks lacks proper error handling for common failure scenarios:

1. FileNotFoundError: When expected_versions.json is not found
2. JSONDecodeError: When the JSON file is malformed or contains invalid JSON

Current Code Pattern

def load_expected_versions() -> dict:
    lock_file = Path('./expected_versions.json')
    data = {}

    with open(lock_file, 'r') as file:
        data = json.load(file)

    return data

Proposed Solution

Add proper exception handling to provide clearer error messages:

def load_expected_versions() -> dict:
    lock_file = Path('./expected_versions.json')
    try:
        with open(lock_file, 'r') as f:
            return json.load(f)
    except FileNotFoundError:
        raise FileNotFoundError(f"expected_versions.json not found in {lock_file.parent}")
    except json.JSONDecodeError as e:
        raise ValueError(f"Invalid JSON in expected_versions.json: {e}")

Scope

This improvement should be applied systematically across all test notebook files that contain this pattern.

Context

• Original discussion: RHOAIENG-27434: Create Rocm Tensorflow Python 3.12 Image #1259 (comment)
• Identified in: jupyter/rocm/tensorflow/ubi9-python-3.12/test/test_notebook.ipynb
• Related to issue Improve error handling in get_expected_version() functions across test notebooks #1243 which covers error handling in get_expected_version() function

Acceptance Criteria

• Identify all test notebook files with the load_expected_versions() pattern
• Update all instances to include proper error handling for FileNotFoundError and JSONDecodeError
• Ensure consistent error messaging across all files
• Verify tests still pass with improved error handling
• Consider whether to fail gracefully or provide fallback behavior in test scenarios