Use agentless deployment 'release' field to agentless deployment modes

[mohitjha-elastic]

Proposed commit message

Add release field for agentless deployments and mark applicable integrations as Beta.

Introduces a new release field for agentless deployments to explicitly define deployment 
maturity (beta or ga). Updates the following integrations to use release: beta for their agentless
deployment mode:
- auth0
- entro
- eset_protect
- imperva_cloud_waf
- lumos
- miniflux
- nextron_thor_apt_scanner
- sophos_central

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 directory.
• Run the following command to run tests.

elastic-package test -v

[infra-vault-gh-plugin-prod]

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

[github-actions]

✅ Elastic Docs Style Checker (Vale)

No issues found on modified lines!

---

The Vale linter checks documentation changes against the Elastic Docs style guide. To use Vale locally or report issues, refer to Elastic style guide for Vale.

[elastic-vault-github-plugin-prod]

✅ All changelog entries have the correct PR link.

[kcreddy]

LGTM. Thanks @mohitjha-elastic

[elastic-vault-github-plugin-prod]

🚀 Benchmarks report

To see the full report comment with /test benchmark fullreport

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 1141b77

cc @mohitjha-elastic

[elastic-vault-github-plugin-prod]

Package auth0 - 1.25.0 containing this change is available at https://epr.elastic.co/package/auth0/1.25.0/

[elastic-vault-github-plugin-prod]

Package entro - 0.4.0 containing this change is available at https://epr.elastic.co/package/entro/0.4.0/

[elastic-vault-github-plugin-prod]

Package eset_protect - 2.5.0 containing this change is available at https://epr.elastic.co/package/eset_protect/2.5.0/

[elastic-vault-github-plugin-prod]

Package imperva_cloud_waf - 1.15.0 containing this change is available at https://epr.elastic.co/package/imperva_cloud_waf/1.15.0/

[elastic-vault-github-plugin-prod]

Package lumos - 1.8.0 containing this change is available at https://epr.elastic.co/package/lumos/1.8.0/

[elastic-vault-github-plugin-prod]

Package miniflux - 1.2.0 containing this change is available at https://epr.elastic.co/package/miniflux/1.2.0/

[elastic-vault-github-plugin-prod]

Package nextron_thor_apt_scanner - 0.3.0 containing this change is available at https://epr.elastic.co/package/nextron_thor_apt_scanner/0.3.0/

[elastic-vault-github-plugin-prod]

Package sophos_central - 1.23.0 containing this change is available at https://epr.elastic.co/package/sophos_central/1.23.0/