Use hiera for cert deployment

[pearsondavid]

Certificate deployment is far from ideal as files are stored in plain text and generated on the puppet master (also mentioned in #1038).

Many file resources use source (file path) rather than content (file contents), thus we can't use eyaml with hiera to store encrypted certs and keys.

Before Example

  file { "${dashboard_path_certs}/dashboard.pem":
    ensure  => file,
    owner   => $dashboard_fileuser,
    group   => $dashboard_filegroup,
    mode    => '0400',
    source  => $dashboard_cert_source,
    require => Package['wazuh-dashboard'],
    notify  => Service['wazuh-dashboard'],
  }

After Example

  file { "${dashboard_path_certs}/dashboard.pem":
    ensure  => file,
    owner   => $dashboard_fileuser,
    group    => $dashboard_filegroup,
    mode    => '0400',
    content => $dashboard_cert_source,
    require  => Package['wazuh-dashboard'],
    notify     => Service['wazuh-dashboard'],
  }

The following code needs updating if this approach is acceptable?

https://github.com/wazuh/wazuh-puppet/blob/main/manifests/dashboard.pp#L72
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/dashboard.pp#L82
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/dashboard.pp#L92

https://github.com/wazuh/wazuh-puppet/blob/main/manifests/filebeat_oss.pp#L96
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/filebeat_oss.pp#L104
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/filebeat_oss.pp#L112

https://github.com/wazuh/wazuh-puppet/blob/main/manifests/indexer.pp#L70
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/indexer.pp#L80
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/indexer.pp#L90
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/indexer.pp#L100
https://github.com/wazuh/wazuh-puppet/blob/main/manifests/indexer.pp#L110