* Add bytestring package to dependencies of generated haskell code
This broke in https://github.com/OpenAPITools/openapi-generator/pull/18047
where tvh introduced an import of Data.ByteString.Lazy. The added
bytestring package was available in some but not all cases.
* update workflow to test haskell servant ping
* update samples
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Co-authored-by: Bastian Senst <senst@cp-med.com>
