Release traefik package for 8.0.0

[tetianakravchenko]

Signed-off-by: Tetiana Kravchenko tetiana.kravchenko@elastic.co

What does this PR do?

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• If I'm introducing a new feature, I have modified the Kibana version constraint in my package's manifest.yml file to point to the latest Elastic stack release (e.g. ^7.13.0).

Author's Checklist

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• Start Time: 2021-11-17T17:40:20.990+0000

• Duration: 16 min 22 sec

• Commit: 5a70f16

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Test	Results
Failed	0
Passed	21
Skipped	0
Total	21

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[masci]

LGTM 👍