Fix keys in the IDE ledger

[paulbrauner-da]

Running daml test on daml-finance with 3.4.0-rc2 throws:

Script execution failed on commit at Daml.Finance.Test.Util.Lifecycle:42:33:
  Validation fails when trying to upgrade the contract 001be16bdc6424174bbee2a87e593e517d8de2416be97d537460e55d5e02d9c16d570bf022728d86fb561b27011eed5e132c6cd5fb2d524841f6dbd22570c90fcd from Daml.Finance.Interface.Instrument.Base.V4.Instrument:Reference@-homePac to Daml.Finance.Interface.Instrument.Base.V4.Instrument:Reference@-homePac
Verify that neither the signatories, nor the observers, nor the contract key, nor the key's maintainers, nor the package name have changed
original package name is daml-finance
original signatories are { 'Issuer_1970_01_01_00_00_00' }
original observers are { 'PublicParty_1970_01_01_00_00_00' }
original maintainers are { 'Issuer_1970_01_01_00_00_00' }
original key is { <no-label> = 'Issuer_1970_01_01_00_00_00', <no-label> = 'Issuer_1970_01_01_00_00_00', <no-label> = { <no-label> = "SwapTest1" }, <no-label> = "0", <no-label> = Daml.Finance.Interface.Types.Common.V3.Types:HoldingStandard@-homePac:BaseHolding }
target package name is daml-finance
recomputed signatories are { 'Issuer_1970_01_01_00_00_00' }
recomputed observers are { 'PublicParty_1970_01_01_00_00_00' }
recomputed maintainers are { 'Issuer_1970_01_01_00_00_00' }
recomputed key is { <no-label> = 'Issuer_1970_01_01_00_00_00', <no-label> = 'Issuer_1970_01_01_00_00_00', <no-label> = { <no-label> = "SwapTest1" }, <no-label> = "0", <no-label> = BaseHolding }

Looks like keys in fat contract instances provided by the IDE ledger are not fully normalized.

[paulbrauner-da]

BaseHolding is an enum, nonVerboseWithoutTrailingNone should delete the tycon for enums and variants, like we do for records.