PLT-6076 Allow metadata tags that are longer than 64 characters.

[jhbertra]

• Adds new metadata version 2 with new tag encoding to disambiguate from old encoding
• Encodes tags as either a text or a list of text chunked by 64 characters.

Pre-submit checklist:

• Branch
  • Tests are provided (if possible)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
  • Formatting, PNG optimization, etc. are updated
• PR
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[nhenin]

@jhbertra FYI, you have your tests failing for the same reasons we discussed this week. (I'm re-running them...)
https://github.com/input-output-hk/marlowe-cardano/actions/runs/5350390372/jobs/9702926203?pr=627

  test/Language/Marlowe/Runtime/CliSpec.hs:189:3: 
  1) Language.Marlowe.Runtime.Cli, Marlowe runtime CLI, create, generates a create tx body envelope
       uncaught exception: TestnetException
       TestnetException:
         exception: 'user error (Error creating database: "ERROR:  source database \"template1\"
           is being accessed by other users\nDETAIL:  There is 1 other session using the
           database.\n")'
         workspace: /tmp/workspaces/local-testnet-50d6e3e3-b5b6-46aa-b050-c21202d12014