[ci] Install pylint before every test

[cdce8p]

Fix failing spelling tests: https://github.com/pylint-dev/pylint/actions/runs/15076143743/job/42383895655

Prevent using an old cached version of pylint for tests by reinstalling it from source before every pytest run in CI.
Furthermore adding --no-deps since we only care about pylint itself. For everything else, like an updated dependency, the cache is invalidated anyway.

[github-actions]

🤖 Effect of this PR on checked open source code: 🤖

Effect on home-assistant:
The following messages are no longer emitted:

1. unsupported-assignment-operation:
   'self.hass.data[DOMAIN]' does not support item assignment
   https://github.com/home-assistant/core/blob/dbc15a2ddac16b02bde793a4dbc4290af42d5659/homeassistant/components/system_health/__init__.py#L269
2. unsubscriptable-object:
   Value 'self.hass.data[DOMAIN]' is unsubscriptable
   https://github.com/home-assistant/core/blob/dbc15a2ddac16b02bde793a4dbc4290af42d5659/homeassistant/components/media_source/models.py#L88
3. unsupported-assignment-operation:
   'self.hass.data[DATA_LAST_WAKE_UP]' does not support item assignment
   https://github.com/home-assistant/core/blob/dbc15a2ddac16b02bde793a4dbc4290af42d5659/homeassistant/components/assist_pipeline/pipeline.py#L800
4. unsupported-assignment-operation:
   'self.run.hass.data[DATA_LAST_WAKE_UP]' does not support item assignment
   https://github.com/home-assistant/core/blob/dbc15a2ddac16b02bde793a4dbc4290af42d5659/homeassistant/components/assist_pipeline/pipeline.py#L1556

This comment was generated for commit 0582b86

[Pierre-Sassoulas]

I'm not sure if I understand correctly but what happens if there's no cache at all ? Don't we need the install without --no-deps in this case ?

[cdce8p]

I'm not sure if I understand correctly but what happens if there's no cache at all ? Don't we need the install without --no-deps in this case ?

This already happens during the cache creation step. E.g. for checks.yaml here

pylint/.github/workflows/checks.yaml

Lines 58 to 65 in 3356e5e

	- name: Create Python virtual environment
	if: steps.cache-venv.outputs.cache-hit != 'true'
	run: |
	python -m venv venv
	. venv/bin/activate
	python -m pip install --upgrade pip setuptools wheel
	pip install --upgrade --requirement requirements_test.txt --requirement doc/requirements.txt
	pip install pre-commit

Only added --no-deps to the pip install calls which test something to force the reinstall of pylint from source.
https://github.com/pylint-dev/pylint/actions/runs/15077014530/job/42386657954?pr=10388#step:5:18

[github-actions]

The backport to maintenance/3.3.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-maintenance/3.3.x maintenance/3.3.x
# Navigate to the new working tree
cd .worktrees/backport-maintenance/3.3.x
# Create a new branch
git switch --create backport-10388-to-maintenance/3.3.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 544a8f189c21bcba7144d3440d93bfeb01622e85
# Push it to GitHub
git push --set-upstream origin backport-10388-to-maintenance/3.3.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-maintenance/3.3.x

Then, create a pull request where the base branch is maintenance/3.3.x and the compare/head branch is backport-10388-to-maintenance/3.3.x.