update cloud env

[PSeitz]

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Describe the proposed changes made in this PR.

How was this PR tested?

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[fmassot]

I would prefer to not put fast field number as today I think we are only getting the timestamp fast field values, right? So I would put only 1.

[PSeitz]

Yes you are right, timestamp and sort_by, but sort_by is deacticated

/// Extracts all fast field names.
fn extract_fast_field_names(doc_mapper: &dyn DocMapper) -> HashSet<String> {
    let mut fast_fields = HashSet::new();
    if let Some(timestamp_field) = doc_mapper.timestamp_field_name() {
        fast_fields.insert(timestamp_field);
    }
    if let SortBy::FastField { field_name, .. } = doc_mapper.sort_by() {
        fast_fields.insert(field_name);
    }
    fast_fields
}