Add Conway Tests

[sgillespie]

Description

Addresses a subset of #1526. In particular, I've added the following test groups:

• Simple
• Command Line Arguments

I've also snuck in a few minor improvements:

• Omit postgres logs from nix test runner output
• Eliminated some duplication between the era-specific transaction forging

Checklist

• Commit sequence broadly makes sense
• Commits have useful messages
• New tests are added if needed and existing tests are updated
• Any changes are noted in the changelog
• Code is formatted with fourmolu on version 0.10.1.0 (which can be run with scripts/fourmolize.sh)
• Self-reviewed the diff

Migrations

• The pr causes a breaking change of type a,b or c
• If there is a breaking change, the pr includes a database migration and/or a fix process for old values, so that upgrade is possible
• Resyncing and running the migrations provided will result in the same database semantically

If there is a breaking change, especially a big one, please add a justification here. Please elaborate
more what the migration achieves, what it cannot achieve or why a migration is not possible.

[kderme]

I haven't checked but MigrateConsumedPruneTxOut tests may not pass.

[sgillespie]

I haven't checked but MigrateConsumedPruneTxOut tests may not pass.

You're right:

prune with full tx rollback:                                             FAIL (0.33s)
          test/Test/Cardano/Db/Mock/Validate.hs:126:
          Unexpected tx unspent count between tx-in & tx-out
          expected: 12
           but got: 14
          Use -p '/consumed-tx-out + prune-tx-out.prune with full tx rollback/' to rerun this test only.

[kderme]

These tests have been adjusted at #1539 and require integration