ci: skip most CI checks if title contains citest skip [citest_skip]

[richm]

When we submit a PR for a CI update or docs, we do not want to start CI checking
for ansible-lint, qemu, etc. When we are doing CI updates to 30 or more
roles, this fires off a lot of unnecessary tests, which sometimes causes the
linux-system-roles org in github to be throttled.

When submitting a PR that can skip ci, use "[citest_skip]" in the PR title.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Configures multiple GitHub Actions CI jobs to be conditionally skipped when a pull request title contains the marker '[citest_skip]', allowing CI to be bypassed for certain PRs such as CI or docs-only changes.

Sequence diagram for conditional CI job execution based on citest_skip

sequenceDiagram
  actor Developer
  participant GitHub
  participant Workflow_ansible_lint
  participant Workflow_codespell
  participant Workflow_markdownlint
  participant Workflow_woke

  Developer->>GitHub: Open pull_request with title
  GitHub-->>Workflow_ansible_lint: Trigger ansible_lint on pull_request
  GitHub-->>Workflow_codespell: Trigger codespell on pull_request
  GitHub-->>Workflow_markdownlint: Trigger markdownlint on pull_request
  GitHub-->>Workflow_woke: Trigger woke on pull_request

  alt Title contains [citest_skip]
    Workflow_ansible_lint-->>GitHub: Job skipped by if condition
    Workflow_codespell-->>GitHub: Job skipped by if condition
    Workflow_markdownlint-->>GitHub: Job skipped by if condition
    Workflow_woke-->>GitHub: Job skipped by if condition
  else Title does not contain [citest_skip]
    Workflow_ansible_lint->>Workflow_ansible_lint: Run CI steps
    Workflow_codespell->>Workflow_codespell: Run CI steps
    Workflow_markdownlint->>Workflow_markdownlint: Run CI steps
    Workflow_woke->>Workflow_woke: Run CI steps
  end

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File-Level Changes

Change	Details	Files
Gate all main CI-related GitHub Actions jobs on a PR title marker so they don’t run when the title contains '[citest_skip]'.	Added an if: "!contains(github.event.pull_request.title, '[citest_skip]')" condition to the ansible-lint job. Added the same if condition to the ansible-managed-var-comment job. Added the same if condition to the ansible-test job. Added the same if condition to the codespell job. Added the same if condition to the markdownlint job. Added the same if condition to the qemu-kvm integration tests job. Added the same if condition to the test_converting_readme job. Added the same if condition to the woke job.	.github/workflows/ansible-lint.yml .github/workflows/ansible-managed-var-comment.yml .github/workflows/ansible-test.yml .github/workflows/codespell.yml .github/workflows/markdownlint.yml .github/workflows/qemu-kvm-integration-tests.yml .github/workflows/test_converting_readme.yml .github/workflows/woke.yml

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[sourcery-ai]

Hey - I've left some high level feedback:

• If any of these workflows are also triggered by events other than pull_request (e.g. push), consider guarding the condition with the event type (e.g. if: github.event_name != 'pull_request' || !contains(github.event.pull_request.title, '[citest_skip]')) to avoid referencing a non-existent pull_request payload.
• Since the [citest_skip] marker is now used across multiple workflows, you may want to define a single reusable expression (e.g. via a reusable workflow or shared env/jobs.<job>.if pattern) to keep this logic consistent and easier to update later.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- If any of these workflows are also triggered by events other than `pull_request` (e.g. `push`), consider guarding the condition with the event type (e.g. `if: github.event_name != 'pull_request' || !contains(github.event.pull_request.title, '[citest_skip]')`) to avoid referencing a non-existent `pull_request` payload.
- Since the `[citest_skip]` marker is now used across multiple workflows, you may want to define a single reusable expression (e.g. via a reusable workflow or shared `env`/`jobs.<job>.if` pattern) to keep this logic consistent and easier to update later.

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