[ci] Use python 3.12 as default

[AlexanderDokuchaev]

Changes

Set python3.12 as default for all action
Update docs requaremets
Usee wwb from fork without unused requarements

Reason for changes

Python life cycle

Tests

https://github.com/openvinotoolkit/nncf/actions/runs/23938057201
https://github.com/openvinotoolkit/nncf/actions/runs/23938057203

[Copilot]

Pull request overview

Updates the repository CI and documentation baseline to use Python 3.12 by default, along with related dependency bumps and workflow adjustments.

Changes:

• Switch GitHub Actions workflows to run on Python 3.12 by default.
• Update docs/Installation.md and the docs test that validates documented versions.
• Refresh several requirements files (TensorBoard / tensorflow-io / docs build deps, add pandas to select examples, and update whowhatbench source).

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/post_training/requirements.txt	Bumps TensorBoard/tensorflow-io; changes whowhatbench git source.
tests/docs/test_md_instalation.py	Updates parsing/regex to validate Python version format used in docs/workflows.
src/nncf/tensor/functions/torch_numeric.py	Removes a type: ignore around np.ma.array(...).
src/nncf/tensor/functions/numpy_numeric.py	Adjusts numpy dtype typing and removes some type ignores around masked array creation / finfo.
examples/quantization_aware_training/torch/anomalib/requirements.txt	Adds pandas.
examples/post_training_quantization/openvino/anomaly_stfpm_quantize_with_accuracy_control/requirements.txt	Adds pandas.
examples/llm_compression/torch/downstream_qat_with_nls/requirements.txt	Bumps TensorBoard.
examples/llm_compression/torch/distillation_qat_with_lora/requirements.txt	Bumps TensorBoard.
examples/llm_compression/openvino/tiny_llama_find_hyperparams/requirements.txt	Changes whowhatbench git source.
docs/Installation.md	Updates stated tested Python version and corresponding versions table.
docs/api/requirements.txt	Updates Sphinx toolchain requirements.
.github/workflows/sdl.yml	Uses Python 3.12.
.github/workflows/python-publish.yml	Uses Python 3.12 for publish job.
.github/workflows/precommit.yml	Passes Python 3.12 into reusable precommit workflow.
.github/workflows/pre-commit-linters.yml	Uses Python 3.12; trims trailing whitespace.
.github/workflows/nightly.yml	Updates nightly precommit calls to Python 3.12.
.github/workflows/mypy.yml	Uses Python 3.12.
.github/workflows/macos.yml	Uses Python 3.12.
.github/workflows/install.yml	Uses Python 3.12.
.github/workflows/gptqmodel.yml	Uses Python 3.12.
.github/workflows/examples.yml	Sets workflow env PYTHON_VERSION to 3.12.
.github/workflows/conformance_weight_compression.yml	Sets workflow env PYTHON_VERSION to 3.12.
.github/workflows/check_documentation.yml	Uses Python 3.12.
.github/workflows/build_html_doc.yml	Uses Python 3.12; installs project + doc requirements in one pip invocation.