chore(build): bump poetry to 2.x

[bowenliang123]

Summary

• to close bump poetry to 2.x #12368
• bump poetry from 1.8.4 to 2.0.0
• changed impacts:
  • Actually switch the directory when using --directory/-C (feat(cli)!: actually switch directory with --directory/-C  python-poetry/poetry#9831).
  • Change the default behavior of poetry lock to --no-update and introduce a --regenerate option for the old default behavior
• actions:
  • Use -P instead of -C prevent switching workding directory in CI tests
  • Remove usages of unsupported --no-update option

Tip

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Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods