Skip workflows for bot-created PRs

[Copilot]

Updates GitHub Actions workflows to skip execution for bot-created PRs to avoid unnecessary workflow runs.

Changes

generate_library.yml

• Extended skip condition: Added dependabot check with label filter to existing pyansys-ci-bot condition
• Safety: Guard github.event.pull_request access with github.event_name == 'pull_request' check to handle workflow_dispatch events
• Readability: Reformatted multi-condition expression across lines with explanatory comment

# Skip if PR is triggered by pyansys-ci-bot or if PR is created by dependabot with 'uv' label
if: |
  ${{
    !(github.actor == 'pyansys-ci-bot' && github.event.action == 'synchronize') &&
    !(github.event_name == 'pull_request' && github.event.pull_request.user.login == 'dependabot[bot]' && contains(github.event.pull_request.labels.*.name, 'uv'))
  }}

label.yml

• Skip for dependabot: Added skip conditions to both labeler and commenter jobs for dependabot PRs
• Explanation: Added comments noting that dependabot handles its own labelling
• The label-syncer job remains unaffected as it runs on push to main branch

# Skip for dependabot PRs as dependabot handles its own labelling
if: github.event_name == 'pull_request' && github.event.pull_request.user.login != 'dependabot[bot]'

---

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[da1910]

@copilot Please also skip the entirety of the label.yml workflow when the PR is created by dependabot. Add a label to explain that dependabot handles its own labelling.

[Copilot]

@copilot Please also skip the entirety of the label.yml workflow when the PR is created by dependabot. Add a label to explain that dependabot handles its own labelling.

Done in commit 2d756b3. The label.yml workflow now skips both the labeler and commenter jobs for dependabot PRs, with comments explaining that dependabot handles its own labelling.