Fix plutus script costing in cardano-testnet

[catch-21]

Description

Recent changes in 313bd58 has caused the the plutus script execution budgets and fee calculation to be wildly unrealistic. E.g. fee is far too high on larger scripts (like 50ada). This PR addresses:

• The bug where execution prices for cpu and mem were mixed up
• The max tx and block execution units are now the same as mainnet's onchain parameters
• The PlutusV1 cost model is now the same as mainnet's onchain parameters

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
  • integration tests
    See Runnings tests for more details
• Any changes are noted in the CHANGELOG.md for affected package
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• Self-reviewed the diff

Note on CI

If your PR is from a fork, the necessary CI jobs won't trigger automatically for security reasons.
You will need to get someone with write privileges. Please contact IOG node developers to do this
for you.