Move IIS metricbeat module to GA

[andresrc]

Metricbeat Module / Dataset release checklist

This checklist is intended for Devs which create or update a module to make sure modules are consistent.

Modules

For a metricset to go GA, the following criterias should be met:

• Supported versions are documented
• Supported operating systems are documented (if applicable)
• Integration tests exist
• System tests exist
• Automated checks that all fields are documented
• Documentation
• Fields follow ECS and naming conventions
• Dashboards exists (if applicable)
• Kibana Home Tutorial (if applicable)
  • Open PR against Kibana repo with tutorial. Examples can be found here.

Filebeat module

• Test log files exist for the grok patterns
• Generated output for at least 1 log file exists

Metricbeat module

• Example data.json exists and an automated way to generate it exists (go test -data)
• Test environment in Docker exist for integration tests

[elasticmachine]

Pinging @elastic/integrations-platforms (Team:Platforms)

[narph]

Created #22956 for fields check mapping.