query stake-pools: add --output-[json,text] flag to control format of the output

[smelc]

Changelog

- description: |
    query stake-pools, add --output-[json,text] flag to control format of the output
# uncomment types applicable to the change:
  type:
  - feature        # introduces a new feature
  # - breaking       # the API has changed in a breaking way
  - compatible     # the API has changed but is non-breaking
  # - optimisation   # measurable performance improvements
  # - improvement    # QoL changes e.g. refactoring
  # - bugfix         # fixes a defect
  # - test           # fixes/modifies tests
  # - maintenance    # not directly related to the code
  # - release        # related to a new release preparation
  # - documentation  # change in code docs, haddocks...

Context

• Part of fixing [FR] - Make output of CLI commands consistent. #566
• Part of this stream of PRs: [--output-format json|--output-format json] format becomes [--output-yaml|--output-json] #523, query utxo: add --output-[json,text] flag to control format of the output #611
• Spin-off of https://github.com/IntersectMBO/cardano-node/commits/smelc/test-cli-queries/

How to trust this PR

1. See is the output of query stake-pools before this PR (so no using the new flags): https://github.com/IntersectMBO/cardano-node/blob/smelc/test-cardano-cli-query-stake-pools-output-new/log.txt
2. See the output of query stake-pools after this PR, when not using the new flags, so clunky defaults: https://github.com/IntersectMBO/cardano-node/blob/smelc/test-cardano-cli-query-stake-pools-output-new/log_new.txt. Note it's the same as item 1.
3. See the output of query stake-pools after this PR, when using all combinations of new flags: https://github.com/IntersectMBO/cardano-node/blob/smelc/test-cardano-cli-query-stake-pools-output-new/log_all_new_cases.txt Notice the behaviors are the expected ones for all combinations.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• Self-reviewed the diff

[Jimbo4350]

What about: https://hackage.haskell.org/package/text-2.1.1/docs/Data-Text-Lazy-Encoding.html#v:encodeUtf8

[smelc]

This doesn't work, because my function converts strict Text to a lazy bytestring.

So I changed the function's name to strictTextToLazyBytestring to make that more apparent. It was misleading 👍

[Jimbo4350]

LGTM! One comment