text: Title: [Actions] Remove deprecated action configuration options
  Body: In the [PR](https://github.com/elastic/kibana/pull/100179) we deprecated the TLS related actions configuration options:
  1.`xpack.actions.rejectUnauthorized` in favor of the new option `xpack.actions.tls.verificationMode`
  2.`xpack.actions.proxyRejectUnauthorizedCertificates` in favor of the new option `xpack.actions.tls.proxyVerificationMode`.
  3.`xpack.actions.customHostSettings.tls.rejectUnauthorized` in favor of the new option `xpack.actions.customHostSettings.tls.verificationMode`.
  
  Deprecated options should be removed from the actions configuration, `src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker` and cloud.
  
  This can be done when telemetry from https://github.com/elastic/kibana/issues/108716 shows usage is below 1% or deprecated for > 2.5 years.