[authentik] Add Agentless Deployment

[mohitjha-elastic]

Proposed commit message

authentik: add agentless deployment

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.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

How to test this PR locally

• Clone integrations repo.
• Install the elastic package locally.
• Start the elastic stack using the elastic package.
• Move to integrations/packages/authentik directory.
• Run the following command to run tests.

elastic-package test -v

Related issues

• Closes [authentik] Add Agentless Deployment Support #18369

[elasticmachine]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)

[github-actions]

✅ Vale Linting Results

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[elastic-vault-github-plugin-prod]

🚀 Benchmarks report

To see the full report comment with /test benchmark fullreport

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 44c46fe

cc @mohitjha-elastic

[elastic-vault-github-plugin-prod]

Package authentik - 1.9.0 containing this change is available at https://epr.elastic.co/package/authentik/1.9.0/