Cleanup LF 2.1

[remyhaemmerle-da]

We need to clean up LF 2.1 archive and transaction and value

The remaining task are:

• [x] move contract key to 2.dev https://github.com/DACH-NY/canton/pull/17374, #18573
• [x] remove scenario (or move them to 2.dev) #18467 #18473
• [x] move BigNumeric to 2.dev #18459
• [x] clean archive proto
  • [x] remove non-interned names https://github.com/digital-asset/daml/pull/18598, https://github.com/digital-asset/daml/pull/18578
  • [x] remove LEQ_, GEQ_, LESS_, GREATER_, EQUAL_* https://github.com/digital-asset/daml/pull/18609
  • [x] remove *_LEGACY builtins https://github.com/digital-asset/daml/pull/18609
  • [x] double check for other drop features https://github.com/digital-asset/daml/pull/18651
  • [x] renumber fields https://github.com/digital-asset/daml/pull/18609 https://github.com/digital-asset/daml/pull/18651
• [x] clean TransactionVersion
  • [x] drop minUpgrade #18417
  • [x] drop minSharedKeys https://github.com/digital-asset/daml/pull/18376, https://github.com/digital-asset/daml/pull/18411, https://github.com/digital-asset/daml/pull/18472, https://github.com/digital-asset/daml/pull/18639,
  • [x] drop V1 transactions #18475
• [x] clean value proto #18511
• [x] clean transaction proto
• [ ] test that proto (archive, value and transaction) with unknow field are rejected.
• [ ] clean specs (Nice to have)
• [ ] decoder check there is no unknown fields (Nice to have)
• [x] drop LF 1 (Nice to have) #18400
• [x] clean compiler/damlc/daml-lf-conversion/src/DA/Daml/LFConversion/Primitives.hs