Cardano Updates

Removes the deprecated `--update-proposal-file` flag from the era-based
`transaction build` and `transaction build-raw` commands by dropping the
two `pUpdateProposalFile` parser hookups and the corresponding record
fields (`mUpdateProposalFile` / `mUpdateProprosalFile`) from
`TransactionBuildCmdArgs` and `TransactionBuildRawCmdArgs`.

Update proposals are deprecated since Conway and the value was already
being discarded internally — the flag was a no-op. Conway and later
eras already excluded the flag from --help (the `Featured
ShelleyToBabbageEra` constraint), so this only affects scripts that
were silently passing the flag for show.

Compatible-mode (`compatible <era> transaction signed-transaction`)
keeps `--update-proposal-file`, since pre-Conway eras still need it.

Release cardano-cli-11.0.0.0

Bump cardano-api to 11.0.0.0

Adapt to the new `Either MakeUnsignedTxError (UnsignedTx ...)` return of
`Exp.makeUnsignedTx` (IntersectMBO/cardano-api#1181). Add a
TxCmdMakeUnsignedTxError constructor to TxCmdError so the error surfaces
with the existing fromEitherCli/firstExceptT idioms, and update the two
call sites in EraBased.Transaction.Run.

Bump the cardano-haskell-packages index-state and refresh the CHaP nix
flake input to pick up cardano-api 11.0.0.0
(IntersectMBO/cardano-haskell-packages#1358).

cardano-api 11.0.0.0 (IntersectMBO/cardano-api#1181) makes
`makeUnsignedTx` error when Plutus scripts are present but protocol
parameters are missing, instead of silently omitting `script_data_hash`.
Two existing tests built Plutus txs without `--protocol-params-file` and
so now fail. Point both at the existing offline-protocol-params-preview.json
fixture used by the other tests in the same module.

Nixpkgs expects to drop support for intel macs in 26.11.