Add gzip writer to CsvBuilder

What does this MR do and why?

Related: #414937 (comment 1461641827)

This MR extends the CsvBuilder with a Gzip class where we can write a collection to a gzipped csv file.

Reasoning: we plan to send large volume of data to ClickHouse and instead of building large INSERT string in memory, we'll attempt to leverage their CSV FORMAT functionality: https://clickhouse.com/docs/en/integrations/data-formats/csv-tsv

The uploading will happen via an HTTP call where the CH server receives the compressed file and ingests the data.

Example usage:

scope = Issue.order(:updated_at, :id)
iterator = Gitlab::Pagination::Keyset::Iterator.new(scope: scope)

max_records = 10
record_count = 0

enumerator = Enumerator.new do |yielder|
  iterator.each_batch(of: 5) do |batch|
    batch.each do |row|
      yielder << row
      record_count += 1
      if record_count == max_records
        # maybe store the keyset cursor here
      end
    end
    break if record_count == max_records
  end
end

CsvBuilder::Gzip.new(enumerator, { title: -> (row) { row.title.upcase }, id: :id }).render do |tempfile|
  puts tempfile.path
  puts `zcat #{tempfile.path}`
end

The iteration will be controlled outside of the CSV library, at some point we might need to stop the processing and continue later. (this means a new csv file of course).

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