ci(*:skip): Improve CI bootstrap action

[danieljanes]

This PR

• Always pins pip and setuptools, independent of poetry-skip
• Installs poetry using pipx to isolate it from Python environment that framework/datasets/... are installed in

[Copilot]

Pull request overview

This PR improves the CI bootstrap action by switching from invoking python -m poetry to using a pipx-isolated poetry installation, ensuring poetry runs in its own isolated environment rather than the project's Python environment. It also bumps pip from version 23.3.1 to 25.3 across CI workflows and replaces bare pip install calls with the more explicit python -m pip install form for consistency.

Changes:

• The bootstrap action installs poetry via pipx (instead of pip) and adds $HOME/.local/bin to $GITHUB_PATH, enabling bare poetry commands in all subsequent workflow steps.
• All python -m poetry <command> occurrences across CI workflows and dev scripts are replaced with bare poetry <command>.
• pip is bumped from 23.3.1 to 25.3 in multiple workflow files, and bare pip install calls are standardized to python -m pip install.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
.github/actions/bootstrap/action.yml	Core change: pip/setuptools installs moved outside the condition block; poetry now installed via pipx into $HOME/.local/bin
dev/bootstrap.sh	Switches from python -m poetry install to bare poetry install
.github/workflows/framework-e2e.yml	Updates python -m poetry → poetry, bumps pip to 25.3, converts bare pip install to python -m pip install
.github/workflows/framework-test.yml	Updates python -m poetry → poetry
.github/workflows/framework-release.yml	Updates python -m poetry → poetry
.github/workflows/framework-docs.yml	Updates python -m poetry → poetry
.github/workflows/framework-docs-update-translations.yml	Updates python -m poetry → poetry, pip install → python -m pip install
.github/workflows/framework-devtools.yml	Updates python -m poetry → poetry
.github/workflows/intelligence-docs.yml	Updates python -m poetry → poetry
.github/workflows/build-deploy-non-framework-docs.yml	Replaces poetry add ../datasets + poetry install with poetry install + python -m pip install ../datasets
.github/workflows/datasets-test.yml	Updates python -m poetry → poetry
.github/workflows/deprecated-baselines.yml	Updates python -m poetry → poetry
framework/dev/build.sh	Updates python -m poetry → poetry
framework/dev/publish-nightly.sh	Updates python -m poetry → poetry
framework/docs/source/contributor-tutorial-get-started-as-a-contributor.rst	Updates doc example from python -m poetry install to poetry install

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