Release IIS for Kibana 8

[narph]

What does this PR do?

Release IIS for Kibana 8
No breaking changes for 8.0

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).

Related issues

• Add guidelines about the supported version of the stack elastic-package#571

[elasticmachine]

💚 Build Succeeded

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Build stats

• Start Time: 2021-11-17T13:51:58.847+0000

• Duration: 12 min 25 sec

• Commit: 51c1d63

Test stats 🧪

Test	Results
Failed	0
Passed	82
Skipped	0
Total	82

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[elasticmachine]

Pinging @elastic/integrations (Team:Integrations)

[masci]

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