Switch to optimum-intel internal testing models

[yatarkan]

Description

This PR updates tests to use models from the optimum-intel-internal-testing organization instead of individual HF accounts.

Checklist:

• Tests have been updated or added to cover the new code
• This patch fully addresses the ticket
• I have made corresponding changes to the documentation - N/A

[Copilot]

Pull Request Overview

This PR updates test configurations to use models from the optimum-intel-internal-testing organization instead of katuni4ka and other individual accounts. This consolidation improves test reliability and maintainability by using a centralized model repository for testing purposes.

Key changes:

• Migrated VLM (Vision-Language Model) test model references from katuni4ka/* to optimum-intel-internal-testing/*
• Updated image generation model references to use the internal testing organization
• Standardized tokenizer test model references across the test suite

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tools/who_what_benchmark/tests/test_cli_vlm.py	Updated VLM model reference to use optimum-intel-internal-testing organization
tools/who_what_benchmark/tests/test_cli_image.py	Migrated all image generation model references (SDXL, SD3, FLUX variants) to internal testing models
tests/python_tests/test_vlm_pipeline.py	Comprehensive update of VLM model IDs, including video models, across test parameters, fixtures, and configuration dictionaries
tests/python_tests/test_tokenizer.py	Updated tokenizer test models to use Phi3 and LLaVA models from internal testing organization
tests/python_tests/test_structured_output.py	Changed Phi3 model reference for structured output tests
tests/python_tests/test_stateful_speculative_decoding.py	Updated Gemma2 model reference for performance metrics test
tests/python_tests/test_sampling.py	Migrated Phi3 model references in sampling tests
tests/python_tests/test_llm_pipeline.py	Updated Phi3 and Gemma2 model references across multiple test functions
tests/python_tests/samples/conftest.py	Updated sample test configurations for MiniCPM, latent consistency, and LLaVA models
tests/python_tests/data/tokenizer_configs.py	Updated tokenizer configuration keys to match new model paths
tests/python_tests/data/models.py	Changed base model list to use internal testing organization

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[Wovchena]

There's merge conflict

[Copilot]

Pull Request Overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated no new comments.

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated no new comments.

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated no new comments.

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