Elasticsearch cloud auth

[YR-ZR0]

Is your feature request related to a problem? Please describe.

I see that the elastic cloud config in the fluentbit type doesn't match the same in fluentd (fluentd is a plugin.secret and flunetbit is a string). I see that Pull Request #1169 set the fluentd type as a secret but was never ported to the fluentbit type, is there any reason for this ?

Describe the solution you'd like

To allow the end user to configure cloud fields as secret pointers instead of strings in the fluentbit es output. Or if possible a union type that would allow the two to be interchangeable

Additional context

No response