Fix create-testnet-data creating negative supply

[carbolymer]

Changelog

- description: |
    Fix `create-testnet-data` creating negative supply
# 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

create-testnet-data was creating negative supply which was preventing node from start

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. See Running tests for more details
• Self-reviewed the diff

[smelc]

Suggested change

	hprop_create_testnet_data_create_nonegative_supply :: Property
	-- Execute this test with:
	-- @cabal test cardano-cli-test --test-options '-p "/create testnet data create nonegative supply/"'@
	hprop_create_testnet_data_create_nonegative_supply :: Property

[carbolymer]

@smelc thanks for pushing the commit with unique worksaces, but I finally reverted it. The reason is that it was circumventing the behaviour of our integration tests, which was saving only failed workspaces by default. After your change all the workspace were persisted which is too much information I think.

Additionally I am not sure about the behaviour Integration test when it's executed multiple times as a property test. This needs to be investigated more thoroughly.